Yes, mania feels good at times, really good, but at other times, it feels extremely uncomfortable. Your euphoric emotions can quickly turn to anger. Being aggressive usually has it's roots in some emotion that is not pleasant. Even just general speeding is not pleasant all of the time. Sure, there may be a few people who experience chronic mania in a way that doesn't ever feel bad for them. But most manic people experience negative subjective feelings from their mania at one point or another.
To say that mania always feels good, and is a state to aspire to, is dangerous for people who actually do experience mania, and extremely tone deaf and out of touch for those who don't experience mania.