I've never spent more time on the computer playing any other game... It's not even close.
Campaign: Although I did like Reign of Chaos's campaign play and a slightly better this one is still amazing. The difficulty is just right and it is long enough to keep you immersed for quite some time. Campaign = 10/10
Heroes: Heroes are certainly an amazing add to this game. I definitely love having a specific leader unit that grows in strength and power to match the toughest beasts. Every hero has spells and some every hero is meant to be used different. In other words, if you master your hero's abilities you can conquer your enemies! Also there are many, many heroes with each race having four, plus even quite a few more. A favorite among many is the Pandaren Brewmaster. Heroes: 10/10
Races: Human, Orc, Night Elf, and Undead. These are the four races you can choose to play as and the races you will manage throughout the campaign. Each of the races are used differently and everyone has to decide who they prefer to play with at that time. Race: 10/10
Units: Units, units, units... so many to choose from! Frozen Throne offers so many units to fight and complete jobs with that it's always hard to decide who to use! In fact, Frozen Throne even has quite a few new units even since Reign of Chaos! There are gargoyles, mountain giants, batriders, berserkers, archers, chimaeras, abominations, and infernals just to name a few! Units: 10/10
Battle.net: "All hail the mighty B.net!" Battle.net is how it is possible to play online multiplayer games with other Warcraft fans around the world. It is truly an amazing thing and tons of people are using it every second! On B.net you can play normal Warcraft games or you can play custom games. Custom games are games actually made by Warcraft players on the World Editor which is included with every Warcraft game. Some people play just for the custom game while other seek to only raise their ranking in the normal battles. Battle.net 10/10
Overall: 10/10 - I see very few flaws in this masterpiece which is probably why thousands of people, including me, still play very often!