The tri-color Pacific scheme is a favorite of mine. I have a Wildcat, Hellcat, Corsair, Avenger, & Helldiver in those colors.
The schemes that I find "ugliest" (read:boring) are the current grays with low-vis markings. Very bland to my eyes, and not much of a challenge to paint. It may be easy to paint them, but I don't learn anything in the process, and thus have less fun. I want to have fun when I build, not just successful results.