I don't know why, but there are a few bands I'd consider doing a tribute band of... and I'm not really a fan of cover bands. But for mere self indulgence and to spread the music of these bands (in some cases), I would do a tribute band for:
Morphine - Underrated (use the term loosely), Mark Sandman's music should live forever. Plus... slide bass is fuuuunnn. The two things preventing it (I would do it too), where am I going to find a sax player around here? Also, there is no way I could croon as sexy as Mark Sandman
Cream - The perfect blues/psych band. I don't think they have a bad song. Preventing: Where am I going to find an Eric Clapton. But I don't think I'd persue this that heavily.
ZZ Top - Rock and Roll. Preventing: I'd need a 4 ft beard.

But I'd want to play guitar! I love Dusty and everything, but I'd want to be Billy ****ing Gibbons. The man defines cool.
Primus - This was a dream a year or two ago. I actually jammed with a drummer who could nail Herb/Brains stuff... and IMO was better than both of them!! I even have a guitarist I could have turned into a Ler. Preventing: Where the hell is my six string fretless.

. Plus the drummer moved away. I kinda got over Primus too, probably forgot half the basslines I picked up.
No need to name your preventing reasons. Who would you tribute? Are you in a tribute band? Lets see/hear it!
I remeber TB had a Lemmy lookalike in a Motorhead tribute band that was sweet. That reminds me...
Motorhead - !!!! Preventing... No Ric, No Vox, No Sideburns.
