I know I've commented already but I didn't get a chance to really read the comments and check out the results.
I was very surprised to see natural/brown/tan/bursts as the third most disliked. I'm a fan of Fender's 3 tone burst personally, maybe it's because my first guitar (well the first I bought with my own money) was a sunburst strat, it just feels right for a strat.
I dig Clownburst on a Les Paul, not sure why. As 3 tone sunburst is natural for Fender Strats, clownburst and tea burst feel natural for les pauls.
Tramps Green is interestin, it's almost like a sewerage green. And yet.... I'm not opposed to it.
Personally, I love weird yellows, pinks and greens though. I even bought the Pacific Peach Jazzmaster (We love Fender here!)
Another favorite of mine is the Goo Yellow or as the kids call it "PooPoo Diarrhea Green!" Ibanez YY10 which actually glows in the dark.
I think PRS' Eriza Verdeburst is one of the most beautiful colors I've ever seen on a guitar pallette. PRS really knows how to mix colors and get those sand bottle art tones into a guitar pallette. Impressive stuff really.
But all that said, I like for my guitars to stand out a d make a statement and while some of them look ugly in perfect lighting (basic house lighting), you must remember that stage lighting is imperfect lighting where the color of your instrument drastically changes for the duration of your set. Even moreover if you have something like a mirror pickguard. The colors pop around 250% difference possibility in the spectrum. It also helps if you compliment the guitars colors with an outfit to wear. Just don't match everything because that will look silly
I just don't really like Black and black/gray instruments are the only color where the lighting rule doesn't apply because it doesn't impede the lighting. I don't own one black guitar asides from a Squier strat with a Rosewood neck (it hasn't been strung or used in years) and I feel like black or gray finishes is lifeless (in most cases).
That's just me though....