I've gone back to my old Dreadstead I got through the old questline (still have the mats for that too). I use it because I have the instruction glyph so it can walk on water with a flaming trail behind it. Don't need water walking or fishing mount for that, I got a class mount for that sort of thing.
I didn't get that mount until level 70 because by the the middle of TBC, no one was running Dire Maul anymore. I managed to get a group in Nagrand by helping some people with some the group quest. They noticed I was always slower than them on mounts because I was going to use the quest for the riding skill level rather than pay for it and get the mount. I got my flying mount right after getting the Dreadstead. I still needed to save up to get epic flying and then build by Engineering Turbocopter (I built the first one that night, so I didn't run around on my Dreadstead much in Outland since I could fly).
I used the Engineering Chopper as soon as I could built in back in Wrath (expensive). It was fun at the start as it was a vehicle at first and you didn't take fall damage (it did instead). I did the minefield achievement jumping around in it for fun. I drove off Dalaran on Christmas without dying then flew back up with my Turbocopter. It was silly fun. I use to drove it straight off the rode in over the big Lion to get to the Harbor to get to Northrend. I was silly and a stunt, but fun. (also jumping off mountians in the Storm Peaks).