This quarter, I'm starting to actually feel like an engineer. I'm out of the "intro engineering" classes and into some of the core subjects. For example, just this quarter, I've learned how to:

Extract next-state-logic from state diagrams and Karnaugh maps.
Analyze structures by taking moments around the body-extended.
Find the characteristic equations for first-order linear homogeneous ordinary differential equations in circuits.
Analyze rolling objects using torque, inertia, and angular acceleration/velocity.
Find the curl of a non-conservative vecor field in space using gradients, cross products, and partial derivatives.

Now, I probably won't use most of it in my career, but hey - who wouldn't want to know cool stuff like that?!

In addition, I'm getting more and more interested in the Putnam math challenge. I sat in on the training class for it this quarter and might take the test next year... 6 hours, 12 math problems, 10 points per problem. A score of 1 out of 120 is considered "good" and places the person around the 50th percentile... The test is actually taking place today, as I write this. It just seems like a fun challenge to tackle once I get a few more math classes under my belt...