Numark Redwave ... ugly as sin and sounds as bad as it looks. A $99 headphone shouldn't sound this muffled. Luckily I sold it and got some of my money back.
Kicker HP541 - Worst sounding headphone I've heard in a very long time. The reviews of this thing claim "clear sound". Sounds more like listening to an HD-650 with cotton stuffed in my ears.
I will say it did have quite a lot of bass. I guess that's what people like. I don't think I'm too hard on this headphone. It's really that bad to my ears. Sound clarity would probably be a 5/10.
Shure SRH-750DJ -
You should have seen my reaction when I first listened to this! Basically take my least favorite signature and this has it.
I guess the reaction wasn't as bad as when I first heard my new Denon D1100, but close! I think I shouted something obscene when I first heard the D1100.
Sometimes my biggest regrets are going back and worth between headphones too much. I've switched between the HD-600, HD-650 and K702/K601 more times than I want to remember.
9/10 times if I don't love a headphone out of the box, my opinion doesn't change. The only exception is the KRK KNS-8400 with it's icicle in the ear treble out of the box. It goes away!
Strangely I absolutely don't regret my purchase of my old Bose Triport AE1 (in 2003?).. I loved those things to death...seriously!
Now..I wonder if I'll hate them now..back then I had nothing to compare them with...I went from some $10 headphones to those.