In my experience, 8 inchers (and up) are rare. This is the Large Penis Support Group, so you see a LOT of them here, but keep in mind this is an international online community. In one's own real-world community, they're going to be much harder to come by.
My 2 cents, to warp a Will Rogers quote, I've never met a cock I didn't like. Oh sure, love the big ones, but I also love the small ones, and the medium sized ones, the cut ones, the uncut ones, the shaved ones, the hairy ones. They are all fun to play with, and as a (about 85%) bottom, I can tell you that I've received some great fucks from all shapes and sizes of cocks. Met with a buddy that had 4 inches and wanted to fuck me with it, and damned if his little 4 inch prong didn't hit my prostate just right.