Good friend of mine's brother was all tough-guy shaved-head, handlebar mustache, guns and pushups and beer for breakfast and yadda yadda. It was a front, like with the vast majority of those guys. A potempkin psychic veneer to fool even himself with. He joined a three patch biker gang because he was basically scared of everything and lonely and wanted a sense of belonging. They did all the typical biker gang shit, drug deals and ripping each other off and the occasional kidnapping and beating the living shit out of some rival club member or snitch or whatever. Some number of years into it one day he was alone at what I guess was their clubhouse and someone walked in and shot him once in the chest at point-blank range with a shotgun and that was the end of that. He was found dead. No witnesses, and the local cop gang not particularly interested in figuring out some rival biker gang murder shit.
So, no, they're not particularly cool. A lot of them are overly impulsive criminal losers wrapped in tough-guy image, clinging desperately to their senses of identity and culture, bad at long-term planning, and not much different than any other gang culture.
There's my thoughts on 'em.