A masterpiece to me. Barring a few more stale off-formula episodes in season 2,XRA has to be one of the greatest works you can find if you're into fringe humor too weird even for adultswim. Indulgent to an extreme,expertly scripted in extreme density (sometimes 3 /4 jokes, in both text and scenery, per couple of seconds!),deep lore and hyper-absurdist, post-offensive(i made that up) plots,all in 10 mins per episode..
PFFRRRRRRR always ensure that the second+ season of anything they produce, write & direct is an intolerable meta-parody of the first! The second season of 'Xavier' is like having all your ontologies trepanned. Sonically/linguistically (and they become very scrambled in the show) 'Xavier' is by far-and-away the densest comedy programme of all time. The word associations are so schizophrenically loose as to be sublime.
PFFR thrive on uncomfortable....(see Wonder Showzen, a show that used young kids to deliver some VERY adult humor) this show drops the exploitation factor and ups the grosseries, or as an Adult Swim bump proclaimed "Warning: this show will break your head open and then hold you in it's arms to make it better"
The first season is good, with inspired moments of insane and twisted rambling humor that is laugh-out-loud funny, while having some logical thread. The second season is too self-indulgent, deserving mostly praise for the great animation. When you get to the great free-roaming ninth episode and concise finale, it's already been nearly two hours of borderline-unbearable babbling.