Glass cannon mage, makes things interesting, especially alone.
Melee toughguy chops and hacks and not much else, basically the only skill or tactics is using a few special moves and healing potions, the rest of the time you tend to plug away at enemies, one slash at a time. If an enemy is weak, the toughguy wins, if an enemy is strong, the enemy wins, simple as that.
Mage needs to treat a single goblin as a potentially deadly threat that needs to be dealt with carefully, lest he be hacked asunder. However, a mage may also run up to a high level badass and expend his highest level spells one after another, dealing out enormous damage before the badass can respond, leaving the enemy blown to smithereens but leaving himself defenseless.
I tried Neverwinter Nights as a fighter and a monk, couldn't bring myself to go further than the first chapter with either, but finished it happily as a druid, then a wizard and enjoyed both runs.