I've heard that people with Pandora bracelets tend to keep the same beads on a bracelet while owners of Trollbeads are always switching beads around. I've found that to be the case. I have two Pandora bracelets. I never change the beads. I also have two Trollbeads bracelets, but I'm always switching the beads around. And I have more beads than can possibly fit on the bracelets.
I have two different lengths of Trollbeads bracelets. This is because I have several different locks and the locks are varying lengths. Also there's more variation in the size of Troll beads--some large, some small, some tiny--so I can use a longer chain to accommodate big beads.
When buying Troll beads online sometimes it's hard to determine the size of the bead, there is variation, unlike Pandora in which the beads are standardized in size, so it's good to be flexible.
I wear a Trollbead bracelet or a Pandora nearly every day. Both brands get an equal amount of time on my wrist. Hard to say which I like better. Maybe the Pandora would win by a nose, but I do like them both a lot. I've been an enthusiast for a little over four years. I started with Pandora and after a few years tried a Troll bracelet after I bought a few glass beads from Etsy artists who claimed they would fit on Pandora but the holes turned out to be too small.

Since I liked the beads I thought what the heck, I'll try a Troll bracelet. I love all the varieties and possibilities that are available for Troll bracelets.