I have come up against a lot of aliens in my day. The Boglodites were never a favorite. Specially not Boris. The only Kylothian I ever met was their queen, Serleena, and she was the reason my memories were brought back so she wouldn't destroy Earth and the MiB. I didn't mind the Baltians, the Zarthans, or the worms. There's others, but that might take all day going into it.