[crazy_geek]

For me, it wasn't so much the explicit ageism (though it was there to be sure), but more of not fitting in because since some time in my 30's, my social interests don't revolve around the consumption of alcohol anymore, and I've got better/more important things to do after work than hang around with coworkers.

Leaving the silicon-valley-flavored "startup scene" (though I'm at a startup, just not a "startup" startup, per se) where I get to work with grown-ups, while not as profitable, has been a nice lifestyle change, and I highly recommend it.