I'm subscribed to about 300 subredits, and I bet about 87% of those are porn.
If anyone wants a specific fetish or preference, just ask and I'll give you a name.
That aside, some of my favorites are:
r/cumov (Basically girls in the anime pantyshot pose)
r/ZettaiRyouikiIRL
r/AthleticGirls
r/boyshorts
r/consentacles
r/CrossfitGirls
r/FitAndNatural
r/fitgirls
r/SkinnyWithAbs
r/fitgirlshentai
/r/BlackTapeProject (Girls with tape tron lines. Better than it sounds)
r/FrillyPanties
r/ghostnipples (Nipples that blend in with the rest of the skin color)
r/ginger/
r/GirlsHumpingThings
/r/handinpanties
r/holdthemoan
r/MuscleWorship
r/NSFWCostumes
r/nsfwcosplay
r/orgasmiccontractions
r/Pantyfetish
r/Exxxtras
r/sheerpanties
r/StretchingIt (Tight clothes)
r/stockings
r/TallGoneWild
/r/tanlines
r/TheRearPussy
r/thighhighs
r/UHDnsfw (Super HD images. Don't go into this one on mobile)
r/WtSSTaDaMiT (Silhouette from see through clothes)
A few of the noticable funny NSFW ones I follow are:
r/ECHi (Jontron)
r/LucieWildeIsRetarded (I'm not a fan of the name, but the main focus is of a pornstar who always makes dumb and unsure faces instead of sultry ones)
r/porn_irl