I have to say the ugliest guitar in my opinon is the Ibanez GAX-70 or any of the Ibanez guitars with that same body. For me it's just too round and too symetrical. The ESP Truckster guitar (even though I'm a big fan of James Hetfield) has to be the worst guitar, especially a signature guitar that I've seen. The paint job just looks fake. The BC Warlock guitars with the metal tribal thing on it are pretty ugly. The Bo Diddley Square Guitars remind me of Nigel's Marshall Stack guitar from Spinal Tap. Other than that, I would say that one neon green that the guitarist from Grim Reaper used to have. I've never been a fan of a lot of the Peavey guitars either. Although I love a lot of their amps and PA equipment. When I lived in Pennsylvania, I'd go to the one local music shop, Hawkins, and people would sell their old equipment to the shop. There was always an abundance of 80's tragedies like the marble paint jobs, any choice of neon colors and everything everyone would love to forget.