Oh sure, loads. Most of my spells have limits, I can only cast a certain number each day. And I can't do things that don't fall under the spell's specific ability- one called Burning Hands can't give me fire breath, for example.

[She delicately brushes out a little knot, long nails stroking like a massage as she works.]

And I'm squishy. Wizards can't take a hit worth beans, so I have to be careful not to pick fights that I can't handle. I can't heal, and I'm not very good with making shields.