Most recently, I was fascinated by the POODLE vulnerability affecting SSLv3. Unable to find a utility that would comprehensively test a system for the presence of SSLv3, I made one myself. The end result was a nifty little Python script that checks a wide variety of common ports to see if they accept connections over SSLv3. It's available in my GitHub under the MIT License.
After graduating, I plan on working at a major tech company or a startup in California. After I get a feel for both, I think I'll know which one I'll stick with. Then again, that's a few years down the road.