My group and I love having many racial options, especially monstrous races, and my current homebrew world has 40 different PC races to choose from (a total of 74 PC race options when you include sub-races).
Some of the official options from published books have been banned, so no half-humans, Drow, Kalastar, Custom Lineage, most races from Spelljammer, Dragonmarked Races, Variant Human, etc. However, I have added several races as well such as Gnolls, Driders, Asleid, Bariaur, Drakkoth, Wilden, Shardmind, etc.