I remember someone made a thread for this awhile back, although it's old now.
Anyway, my favorite evil team in the games is Team Galactic. Giving the same reasoning as before, the dude didn't want to profit off Pokemon, cover the world in land or water, have all trainers release their Pokemon or control the region, destroy a good number of the world's population, get in touch with ultra beasts or be punks, yell a lot, or anything else.
No, Team Galactic, and more specifically, Cyrus, wanted to
downright create a new universe. One with no emotion in it at all. Now that's scary. Imagine that your universe is in danger of being taken away from you and there's nothing you can do about it, cause that's about every NPC that wasn't the MC in the gen 4 games.
Also, the dude's team, especially in Platinum, is highly dangerous. Not to mention he's got a sick battle theme. I rest my case.