No Man's Sky

1. No hard game saves, which can lead to autosave nightmares (i.e. dying over and over again).
2. Lose all your stuff if you die (but you can go back there and find it (a common gaming dirty trick), tough to pull off if you die in your ship in the middle of space.
3. Not enough environmental suit inventory space - You can buy extra slots of inventory on your suit for increasingly exorbitant amounts of "units", but every enhancement to your suit (life support, stamina, shields...) cost you a slot in your inventory EACH.
4. No ability to upgrade ship inventory - You can upgrade your ship inventory slots by buying a new ship for unrealistically HUGE amounts of credits or get lucky enough to find a crashed ship with more slots, but you are limited as to what you can transfer to the new ship. This means that all the artillery and shield and warp jump equipment you have spent so much time & resources in, must be broken down for a paltry return on parts or abandoned altogether. Then you can start investing more time & resources repairing and upgrading equipment on the crashed ship all over again!
5. No ability to customize appearance of gun (multi-tool) or ship. You get what you get, whether you like it or not. You never see your own character or his/her environment suit so, needless to say, there is no cosmetic customization there either.
6. The multi-tool (gun/ mining device) is the same as the ship except you cannot gain more upgrade slots by finding a "crashed" multi-tool, although NPCs will occasionally offer you their multi-tool if you choose the right response in their dialog. Again they are trades "as is". You cannot transfer ANY of the upgrades from your own multi-tool to the traded weapon. Even if you know ahead of time that they are going to offer you a multi-tool trade and you try to strip your own multi-tool in anticipation, the stripped weapon seems to affect the multi-tool offered, meaning that you will be offered a downgraded version of the multi-tool you might have been offered had you not stripped the weapon. Sometimes the trade is just bad with you being offered an obviously inferior weapon.
7. SAMENESS - It is truly an expansive game. But that doesn't mean there is a lot of variety. In fact, in all of the galaxy there are only 3 races (not including yourself - you never meet another "person" of your own race). The plants mostly all look the same on every planet, the animals fall into a small group of variations on the same theme. The buildings, outposts, shelters all look the same with little variation.
8. Upgrades are lacking. You get basically all the upgrades to suit, ship & multi-tools in the game within the first few hours of gameplay. After that finding any new "recipes" for upgrades is pretty rare. The coveted Atlas Pass blueprints of which there are three levels that allow you access to previously denied areas in the settlements yield you nothing new in the long run and levels 2 & 3 of these blueprints are so rare as to be practically non-existent. This would be much more frustrating if they allowed you to gain new or otherwise unattainable treasures, but they just allow access to more of the same stuff you access everywhere else.
9. Dirty Tricks - The game is filled with cheap dirty tricks to frustrate you and artificially extend gameplay length. You ship won't land properly, as in next to your target. You can't look around while sitting in your ship, making you get out to look around. The navigation in the ship is clunky never really enabling you to look where you want to or completely just stop and hover. The ship controls are constantly floating around making you have to constantly nudge the thumbsticks to get the ship looking in the right direction. Ship takeoff is ludicrous. You have to hold the button down for 2 seconds or more but sometimes this will cause you take off slowing and sometimes it will cause you to instantaneously leap completely out the planets atmosphere leaving you in the space beyond and possibly losing you settlement markers. When your ship lands in a settlement, it is invariable in the back of the complex facing away from the complex making you have run around the entirety of the complex to reach the front door. When you land it is always a good away from your target.
10. The game has decided that alien words are treasures. The only consistent variety of items in the game are the words that you have to buy or are rewarded with as treasures and loot. In order to understand the aliens in the game or some of the riddles, you must buy or find translations of INDIVIDUAL words throughout the game. And not the words YOU want. Random words given in an order that makes no sense at all. Example: it is a looooong time of finding and buying words before you get the translation for the word "you", which is always one of the first key words you learn in understanding any new language.
11. One of the over-hyped aspects to this game is the ability to discover and even name new species, planets, solar systems and settlements. You can do this, but it basically useless. There's no maps in the game except the star map which you can only access from outer space. You can look in your journal to find the names and locations you have come across but there is no way to find settlements on the planet your on by the customized name. They all just show up on what I will laughably refer to as a compass on your UI as generic settlements with no real way to differentiate them from all the others. This makes finding a store to trade in your ridiculously small and overflowing inventory a real challenge. Which brings me to another point.
12. INVENTORY MANAGEMENT is the biggest challenge in the game! And intentionally so. Every little upgrade costs an inventory slot and almost nothing stacks in your inventory except the elements that you mine from the different planets. Most recipes will call for some element or two and an item that doesn't stack making you carry around 2 to 10 of same item all slotted into INDIVIDUAL item slots.

In summation, the game IS fun. As a starter project. There's really no missions, variety is lacking, loot is everywhere but lacking in variety as are the aliens and environments. The expanse is endless. An endless sameness.