I've got to go with the TrailBlazers, it has only been tweaked a few times in the last 43 years and probably will remain virtually the same for the next 50 years. The Clippers and Lakers also have timeless logos that won't change as well as the Knicks. I could see the Celtics, despite all of their tradition, one day just going with a shamrock logo and dropping the 1950's cartoon lepercaun.
this.. the team with the most NBA championships in NBA history is not changing their logo. Only crappy teams like the Bobcats, Raptors, Pelicans/Hornets constantly change their logos.
Yeah, Bulls have a great logo, never changed. Popularized by MJ, and the horns look like they have a hint of their oppenents' blood on them.
As much tradition as they have, I could actually see them getting rid of the Lepercaun and just going with a shamrock. But just like other franchises throughout sports (ex. 76ers) it could come back.
Celtics and Bulls. Rockets logo=Yao era+Toyota. Chinese-style brushstrokes, upside-down Toyota symbol.