In the show: alicorns, unicorns, pegasi, and finally earth ponies (hands-level manipulation FTW).
In the fanon: unicorns, pegasi, and earth ponies. Alicorns are dead to me for OCs. I've NEVER seen any non-Mary Sue or justified alicorn in this fandom, except for Nyx (and Cadence is only going to make this worse). "My OC is the child of Celestia and has rainbows all over the body. Oh, and he/she also has horns! Derp." Every. single. one. of. them.