dude is a waaaaaay smarter than he's portrayed. and i think there's a reason for that. he doesn't allow his intelligence to keep him from doing his job, which is to make his guests feel comfy, let them promote their shit and make his audience laugh. he feels no need to cut them at the legs when they say some stupid ass shit. he could, mos def. but, he doesn't do it. he prolly wants to do that shit every night, but jay keeps his game face on.
dave is a miserable asshole, but i still love him more though. but, leno is clearly the more mentally and emotionally evolved of the two.