To go for a bunch in one fell swoop: D&D is fun, but it's a pretty shit system. And before someone asks, 3.PF and 1E have the honors of being some of the biggest examples, not biggest exceptions.
Eberron and Ravenloft overshadow some of their contemporary settings: While many of them have issues (the less said about the Kara-Tur supplements the better), I'd readily recommend Dark Sun or Al-Qadim over the prior (if in part because Ravenloftreally doesn't work for most editions, and while Eberron is a decent setting D&D is one of the worst gaming systems through which to play it out as seen by the fact that every official release has almost an entire PHB worth of changes just to make it work).
3.PF is not about Cast-or-Bust. 3.PF's community will do its damndest to tie your wrists and give you cement shoes if you so much as glance a second too long in a vaguely Martial-Class direction.
Thri-Kreen should be a PHB species you fucking cowards.
Farting and burping shouldn't be so taboo in the west. Everyone does it, and it's natural. It's gross yeah, but we shouldn't shame someone so much for ripping one loose in the office space or on the bus. Ya'll do it at home shamelessly next to your siblings I bet. Quit being so stiff about it.