Warriors can dish punishment and more importantly they can absorb it. Warriors keep the monsters occupied while the casters launch away from distance. Warriors don armor, they wield the weapons, and when it is all said and done they often get all the credit from the onlookers. Many people might argue that warriors are not an incredibly interesting class to play. Casters gain a whole new set of spells every 4-5 levels.
Warriors only have a few interesting skills and they are few and far between.
However the flip side of the coin is that warriors are the ones who are in the thick of things. When the casters have their noses in the spellbooks meditating for the next heal or for the death blow, the warriors will be battling on. While casting types await to get new spells and other meelee types await for new special skills the warrior really lives from item to item. A warriors livelihood lies in his equipment. The advantage of this is that a warrior can concentrate purely on equipment and does not have to worry about spells and the like.