If I had to list down my favorites of each game:
1. Fire Man. Elec Man is cool, but Fire Man is underrated.
2. Wood Man. Not very surprising.
3. Shadow Man. His weapon isn't completely broken, but still useful, and has a challenging fight.
4. Pharaoh Man. Without his weakness, he can be tough. He also looks rad.
5. Gravity Man. My only gripe with him is his weapon. I also like Charge Man and Crystal Man.
6. Tomahawk Man. Even though that's not a tomahawk.
7. Shade Man. His stage is a big plus in this. Freeze Man, of course, is a close second.
8. Grenade Man. He has a hilariously cringy voice.
MM&B. Astro Man. Mainly because he has a creative weapon.
9. Splash Woman, Galaxy Man, Tornado Man, or Hornet Man. MM9's Robot Masters are all so good.
10. Sheep Man, duh.
11. Fuse Man has made a good impression on me, so far. Apparently, Acid Man has been leaked, and he looks cool.