Wolves. But in general ESO mounts are very boring and not really inspired besides some special effects on Apex mounts. Mount variety is very very low and most mount variations are just the same base model with different armor attached to it.

Horses for now.
I love that one horse for 100 gems from ayleid crates. It looks more like a warhorse than all glowing mounts and horses. I love that one.

Guars for my bosmeri, bears for my orc and horses for my imperial and bretons.

Senche are my personal favourite, but what I use depends on the character. They all have a few horses they'll use and then other animals they're likely to have enountered in their travels.

some horses looks great, but their animation ... well it looks like you hijacked it from Barbie

I can't vote because I love them all in looks except for the insect ones and the bipedal ones.

Like I said the others I love in looks but I never use the bears or the camels because their movement pisses me off. I really do not like the way the walk.

My favorite mounts are mounts for two players. Oh wait:)

I voted "heavyweight" because my favourite one is the vampiric senche which is a heavyweight. Otherwise I really like bipedals, especially guards, and dwemer spiders. Some others are ok if they're special, like, the halloween wolf is cool because it makes you head disappear and speaks some lines in daedric, and the blazing wolf is also cool because it's always ablaze. Most "normal" mounts are boring to me, I need something special about them - not necessarily lasers and red lightning, but even just the zombie horse is very nice to have for a necromancer, for instance. Couple it with the zombie skin and some torn/ruined outfit and it really works well.

My two favorites are the Psijic Exemplar horse and the old senche tiger loyalty reward.

I've also used some indriks and other mounts. My only Redguard rides a camel.

Horses for me.

Can't help it, I don't feel comfortable at the idea to put something into mouth of another animal as to ride it!

Toyota Supra is pretty cool-looking, but until they're available in game, I like wolves.

the hell is "heavyweights"?

I usually default to my war horse. lotsa other cool mounts, wolves are neat, got a cat too, and camel is awesome. but who don't like the mount the guar?

but at the end of the day, it's the trusty steed.

Senche, but I use horses and guars/kagouti a lot too. I like camels too, but they tend to feel slow even though they aren't any slower than other mounts. I like the nix-ox but I swear it aggros mobs more easily, which is why I probably won't pay for any "wide" mounts.

For a while I always chose mounts that match the environment, but now I mainly use Senche. They have the smoothest riding animation.