Quick fun question for yall: What are your top 3 favorite enemy types to use in games? And do your players know to expect them?

My top 3 favorite enemies are always:
1) Undead
2) Regular humans or humanoids
3) Plants

My players know there will always be undead somewhere lol

It's a little ironic because I prefer to play PCs / use Npcs that use a lot of mind effecting abilities, which don't work against undead Or plants, so I punish myself a lot of the time