For me personally, I love dealing raw physical damage with characters like Barbarian unlike using your spells and relying on them most of the time. It gives me a lot of freedom in just running at enemies and crushing them and unleashing all my rage on them.
Yeah I find the spell system too complicated for my simple-mindedness so I usually stick with Barbarian physical attacks and such. I've been considering trying out the monk though since it has a neat little balance.