I like Nashua brand, but to be honest I never met a duct tape I didn't like.

You're not supposed to use duct tape for electrical work as the cotton threads in it can conduct electricity. Other than that I guess the sky's the limit.

http://edition.cnn.com/2003/US/West/09/26/grizzly.attack.ap/

Backpacker magazine did an evaluation of different brands of duct tape. Type in "backpacker" and "duct tape" in google. I couldn't get the link to work.