I personally draw all my inpiration for my campaign from either Tolkien or real-world mythology, folkore and legends - in that order. So, i have halfings and orcs IMC, and since Tolkien had goblins related to Orcs, IMC they are brethren. I don't do any "made-up" monsters (read that in context here - contemporary monsters, like illithids, cat folk and such) simply because i wanted a classically- inspired fantasy campaign world, which is set around 1050 AD, IRL time.
that aside, as i said before, i do have hobbits IMC - statted up for D&D the way Tolkien had them, as close as i could get. I do call them halfings though, but have always wanted to just call them by their proper name, Hobbits. I use D&D names for them, but the stats are different. There are just some similarities with both types, so i went with it.
IMC:
Stoors = Stouthearts (short and broad, generally hold positions of importance in their shires, but don't go on adventures)
Harfoots = Lightfeet (commonest of all subraces, medium height and build, never go on adventures)
Fallohides = Tallfellows (tall and slim, most likely to adventure, live near the edges of their shires/dales, etc)
if you all want, i could post their stats for critiques, which is something i have been meaning to do. we shall see what feedback is given though.
Cheers!