Generally, I get that feeling from work projects that I've self-initiated to solve a problem. Fortunately, I get the chance to do this a lot. With the advent of agentic coding, I am able to solve problems at a much higher rate.
Quite often, I'll still "raw dog" a solution without AI (except for doc lookups) for fun, kind of as a way to prove to myself I can still do it when the power's out.