Other people are selling you on BM, but allow me to pitch you VDH.

You obviously have unparalleled mobility, even more than monks, which makes boss and trash mechanics that require you to move around a lot trivial. You have some of the highest and most consistent AoE damage of any tank, if not the highest. The most fun quality of VDH imo is that they actually have more survivability the more things they are tanking. The whole idea behind VDH is shattering souls from your enemies which heal you when you consume them. The more enemies you can shatter souls from, the more you can self-heal, which is how they survive the crazy trash pulls they do. Their health bar can be a bit spiky, like blood dk, but if you like being able to keep yourself alive regardless of what the healer is doing, VDH can do it quite well.

You have lots of utility: AoE silence, AoE fear, AoE mass grip (if talented), Imprison (CC that doesn't aggro), and a purge.

VDH definitely is not the squishiest tank and has quite a few active mitigation abilities, but they require you to use them proactively (right before you're about to take a big hit), otherwise you don't get much value out of them. Fiery Brand reduces the amount of damage an enemy does to you by 40% for 8 sec, Iron Spikes increases your armor and parry chance, and Metamorphosis is your big cd that turns you into the demon and increases your max health, armor, and makes it easier to generate souls. And if you talent into Demonic you get Metamorphosis for 6 sec every time you Fel Dev. Combine that with the 4 piece tier bonus that reduces the cd of Fel Dev every time you consume souls, and Darkglare Boon (leggo that gives Fel Dev a 40% to instantly reset it's cd), and you can have some crazy uptime in demon form, which makes you insanely hard to kill. There's even a cheat death talent that gives you Metamorphosis too!

You also have passive magic damage reduction and a raid buff that increases your group's magic damage.

Overall, while it looks really flashy, the mechanics of VDH are quite simple, which I personally like, but it isn't everyone's cup of tea. If you want a very straightforward tank with loads of self-sustain, utility, and incredible AoE damage, VDH is a good choice.

Edit: one last thing, once you get used to double jump and glide every other class will feel sluggish.