Seasons one pays off in the end in a big way though, and unlike Agents of shield you're rewarded for watching from the start, they don't just retool it to tie into a movie.A lot of them have gone metahuman, though, for example Captain Cold. I don't know if that's still true or not, but for awhile there he'd dropped the blasters and went all Iceman.
Also, agreed on Arrow. Though from what I've heard, the first season's pretty a pretty slow burn, and all the goodies are in season 2.