I'm actually guilty of not riding my faction mount, the closest I ever got being the Swift Warstrider. I currently use the very awesome but all-too-common Black War Bear (every day, it's like 40 more people pop up with the mount), and for flying I use the not-so-common but also not-very-awesome Albino Drake. On my engineer I'm enjoying the Turbo-Charged Flying Machine and I plan to get a motorcycle when he dings 80. If I could afford Salvaged Iron Golem Parts and everything else, that is. There are really quite a lot of mounts to choose from, which is probably why the easily acquired, 'vanilla' mounts aren't as popular.