Well right now I've got a Class A amp project going and seems to have some sort of nasty oscillation which I can't pinpoint...or at least I haven't tried in a while. That's the main reason. I built the amp before I had a lot of experience with electronics so I've been considering just scrapping the thing and starting over. Design the circuitry myself this time around.
Also I'm working my way through an EE program so I figured I'd need a scope in the future anyways. I've used digital and analog scopes in the labs at the university. Things like finding the value of an inductor by measuring an ellipse on the scope's screen, resonating circuits, frequency responses, etc. Basic stuff since it's my first year. And I've recently been collecting broken electronics and fixing them so who knows, a scope may come in handy once or twice. So far my tool set consists of a single, cheap multimeter that cannot properly read AC voltages. It's sad really, but I found you can do a lot with just voltage and resistance measurements.