The Elder Scrolls 3: Morrowind is a great find in my opinion. I'm always complaining about linear gameplay and how boring it is during replay to find yourself ducking behind a wall until one of your buddies goes through a door so that the Nazi soldier won't get a chance to take you out from behind (Call of Duty review). This game is just beautiful in my eyes. The replay value is unbelievable. The sheer number of races, classes, signs (that you're born under), and skills is so amazing that you can spend a solid year playing and still not have experienced half the game.
Sure the storyline is pretty straightforward, but the number of sidequests is astonishing. On your way between major cities you could end up reuniting traveling companions, killing a witch that stole a barbarian's clothes, or doing your own thing and slaughtering the smaller villages (hehehe). The fact of the matter is that there are so many quests in this game that you can always find something new to do regardless of how long you've played.
Since I purchased this game, I've played as high elf, dark elf, orc, argonian, imperial, breton, wood elf, and khajit. I've been a mage, barbarian, theif, archer, pilgrim, knight, and assassin. And every sign to be born under, I have been atleast once. Even with this wide range of races, classes, and signs, there are still many many more that have not even been mentioned.
As far as linearity...forget about it. Of all the words to describe Morrowind, linear is not one of them. Sure the main quest is unchanged, but there are so many ways to get there that every time you try, your experience will be different regardless of how hard you try to make it linear.
The map for this game is amazingly large and diverse in fauna, animals, and landscape that you will start to recognize where you are by what's around you instead of where your arrow is on the map.
The combat style is somewhat boring and simple, but again, there are so many different styles of combat that you can hardly blame them.
The only thing that truly bugged me was that sometimes the graphics go a little funny when looking at doors or sometimes with armor, but that might just be my computer...
+ + +NOT LINEAR!!!
+ Very replayable!
+ So much to do...
+ Enormous map
- Melee combat needs some tweeking
- Graphics a little buggy