Posted this to Newgrounds, and now copy/pasting it here:
Who are some of your favorite enemy and/or enemies in whatever game and/or game series?
Like in:
design
how to kill them
what benefits you get from them
what they do to you
Would you rather father/and or have their children
Difficulty in fighting them
Fun while fighting them
If it's in a RPG, then how the exp and money let's you smooth through the story without having to stop and grind
How much they catch your attention
Personally; one of my favorite enemies to fight were in Kirby Superstar (If I mention something put in other games; I haven't played many Kirby games..)
On top of the expected copying of their abilities; the possibility to turn any of them into the 2nd-player and/or a CPU partner is a very fun thing to consider when coming across them.. Even if they don't help with anything too much