Wow, we all wish for that! As to the yo-yo, no getting around it -- it's the nature of the beast. With luck, meds can help even it out, so at least the highs are not over the top and the lows are not so low, but the yo-yo is simply what we're up against...
I hear you on the catch it when it's up thing-- there's nothing I love so much as a *good* hypomania. But damn if it doesn't just as often result in nasty levels of irritability, agitation and just plain not-niceness towards others..., not to even mention flailing self-destructiveness. *If only* the good parts could be isolated, but it seems not so... (hey, who *doesn't* want to feel wildly creative, hugely amusing and like a flippin' genius?! But before you know it, the genius gets over the top, frustrated and is throwing themselves against walls. Oh wait, that's me... ... but it might just sound familiar...) to you, Tmac.