You probably already have it, but Spice of Life is the must-have misc clothing mod.
For hair and eyes, TheLastTimelord has it right with Mikoto Beauty, it's the best mod for it. For beards, check one of these
http://www.nexusmods.com/newvegas/mods/35994/?
http://www.nexusmods.com/newvegas/mods/49624/?
http://www.nexusmods.com/newvegas/mods/57497/?
If you want a custom race that's lore-friendly, TheFourthHorseman has two you might like
http://www.nexusmods.com/newvegas/mods/47676/?
http://www.nexusmods.com/newvegas/mods/48629/?
Not many earrings mods but I found a few
http://www.nexusmods.com/newvegas/mods/41775/?
http://www.nexusmods.com/newvegas/mods/55329/?
Tattoos are even scarcer than earrings and most of the ones I found are NSFW, but here are a few
http://www.nexusmods.com/newvegas/mods/54920/?
https://www.gunetwork.org/t5202-breeze-male-tattooDragbody has a neck seam concealer that doubles as jewelry if you want it
http://www.nexusmods.com/newvegas/mods/53649/?
Now go out there and be the prettiest damn courier the Mojave has ever seen.