Sounds like me...but I'm much worse.
Bought the HD-650 twice in five years. One was the new white screened version. Hated the old one.
Bought the AKG K240 Studio twice. My first was plasticky sounding and had bloated bass. Probably a defect. Mine now is a keeper and I love it.
D2000 twice. First part was portable amped and hated it. Second time I had a desktop amp and loved it!
K701 and K702. Owned THREE times! Always loved the K701, but not so much the K702. How is that possible?!
DDT-880 32 ohm. Owned twice! My first pair had very harsh treble and too much sibilance. Maybe portables amps did it?
Owned the DT-990 twice. First pair I loved, but wasn't as educated when it came to sound. Absolutely hated it years later. Mine had cave-like mids.
SRH-840. Owned twice. This is the headphone I missed most after I sold it.
I think it's safe to say that the sound quality of different pairs of the same headphone can vary more than we think!
The headphone I really want to buy again right now the most is the K602. That thing was so comfortable. It just didn't have the clarity and detail of the K702, but still good.
Of course I miss my ATH-AD2000 a bit too.
It's not a good match for my head.
Oh and can't forget I've had the AD700 twice also. First time I loved it, but it wasn't good for me as my ONLY headphone. Luckily I got my 2nd pair to fit better.