I'd be afraid of feeling good because of the association of euphoria with mania, but now I look out for my more tell-tale signs like lack of need for sleep, hypersexuality, being unable to keep up with my thoughts, and certain specific behaviors I get involved in like listening to multiple songs at the same time, especially specific songs (a couple overt "yeah, I'm manic" ones are Experiment on Me by Halsey and Handlebars by Flobot) on repeat. Hell, if I find myself in Maine that's probably a sign.
But yeah, (hypo)mania has way more tangible symptoms than just "do I feel TOO good?" and being able to recognize those starting to bud becomes easier over time (although maybe not responding in an appropriate manner )