PSOBB, Simply fun especially with friends.
There are three classes: melee, ranged, and spell type. Each class is very unique in fighting style. Melee classes can wield daggers and large swords, and are usually stronger in the earlier levels. Ranged classes (guns) can shoot multiple enemies and lay traps for enemies. Spell type, well use spells, and are the advanced class, meaning they are a bit harder in the beginning of the game but very strong at higher levels.
How does the game work? Well you start out in a lobby where you can join or make a room and set the difficulty of the level. Then you are sent to a map where you pretty much follow a path and slay monsters. That is partly the downside of the game, it lacks open ended-ness that a hardcore gamer would love, but this is a casual friendly game, so no complainin from me. At the end of every 'level' there is a very strong boss to be fought.
Sure the game has camera issues, but it never really bothered me. It is much fun to slay a huge dragon with your pals or hunt for rare items.
The game play is a little repetitive but if you are a casual gamer it wont bother you as much. It mainly consists of you going to the same old level, fighting the same monsters and bosses; difficulty helps in that respect.
The music is amazing, it is my favorite video game music. It is totally sci-fi and fantastical; definitely makes you feel more in the world of PSOBB.
The biggest downfall are the fees, nobody wants to pay for a game. :(