Usually it's r/Cynicalbrit and r/Undertale. Yeah I'm one of those guys.
r/dragonsfuckingcars
FUNNY - PICS - VIDEOS - GAMING - H3H3PRODUCTIONS - ONEPUNCHMAN - DRUNK - STALKER (As in S.T.A.L.K.E.R. aka "Get out of here, S.T.A.L.K.E.R.!" aka "Cheeki Breeki!".) - SILENTHILL - TOONAMIAFTERMATH
Sorry for the caps, just copy pasta'd my bar.
r/lockpicking and r/cigarettes
r/tsunderesharks
I used to browse a few roguelike and grand strategy game subreddits and some technological and humour ones I can barely remember.
I gave up on the community completely when I noticed most of the places I frequented were completely surpassed by official forums (especially Dwarf Fortress) and that the ones that weren't were plagued with "le ebik LIE 4 UPBOATS xDDD!! i was rapeded 4 TIMES karma plz??? xD" crap and just general lack of quality.
The one about serial killers, occasionally
That's it
r/Oblivion
r/Protomen
r/Petticoats
r/Demonssouls
r/RetroFuturism
Just to name a few