Warriors can surly be a pain in that ass at the lower levels. They tank good, they do good damage and if you haven't met the warrior before or looked at his weapons you have no idea what he is going to do. Alot of damage? Get rid of your weapon by droping strength? (If he hasn't that choicen he'll most likely go for dirt/disarm.)

As the above said, play your favorite class to con-death or age-death. Learn what you can, then go and play a warrior and learn what you can. Best way of learning a class is by playing it. I've returned from a 6 years abscent, and the only three classes I've played are warriors, shifters and paladins. I have quite some troubles with most other oponents I meet. ^^ (Done 2 hero warriors and one 44+ the past 4-5 months, so I believe I know warriors quite decently now.)

It takes time, but it is fun learning. heh

Always shoot first and then call whatever you hit the target.