Nice Idea, I am swinging between Roms :P Almost on Daily basis and then i keep myself busy restoring everything.
I am also planning to release my own custom ROM, lets see when i will be able to do that (Still is Alpha phase)
My Phone history -
Current - Galaxy S III - stock
HTC Desire - Dead after i threw it.. R.I.P my best phone.
Iphone 3G - Jailbroken/unlocked
LG - some model
Samsung - some model
Nokia - some model
Motorola - T190 -> my first phone