Fighter. Hands down, my favorite playable class for a very long time has been fighter.
The first character I put on paper, but did not play, was a human fighter who was escaping fighting pit slavery. The character I played to the highest level I've to date attained was a human fighter. It was a great class for me to learn the D&D systems, learn how combat and the battlefield worked, and be able to have a pretty straight dotted line when it came to decision making.
(this is kind of a funny point of comparison here, for me, as a gamer. I stuck with fighters in Dungeons and Dragons at the beginning, because of their lack of complication and their perceived ease. In Shadowrun, which we play once a week, I've been playing a Decker, which many other people at the table think is the hardest role to play. It's interesting, to see how different systems might appeal to you differently, and also to realize and recognize how you might have grown and changed as a gamer)
