(These are roughly in the order I leveled/am leveling them.)
Duskhawk has ended up in level 40s-ish mail, a lot of it from Arathi Highlands and thereabouts. The pants technically don't match, since I'd have to do an Alliance quest for the mail version, and I haven't gotten around to it. I'm still using that belt with pouches, and the Golden Bow of Quel'thalas, because, damn, that bow. I like how this turned out because it matches the guild tabard pretty well.
I loved Elsa's blue mog and that staff from the garrison, but between this version of the discipline staff and those robes - I really like the greenish runic band running down them. I don't have all the color morphs of this since I didn't raid much on her.
I don't like any of my rogue transmog options. I'm going to have to do just enough of Antorus to get her the badass rogue hat in there, if I can. I'm not great at rogue dps.
Okay, so I just kind of randomly made this mog for my druid when Legion hit, before I'd even gotten the staff, and, um. Then I went to the herbalism trainer. Yeah, that was awkward. That said, this goes with the handful of colors I have for the druid staff, so I'll probably keep it a while.
This is not Emerald Plate. As much as I loved her in the Emerald Plate, I really like the way this came together as a sort of utility set. The shoulders are shiny, and I'm a bit disappointed I can't get that same kind of metallic sheen on more gear.
It was weird for me to be leveling my warrior this late compared to my other alts, but I wanted to get at least the basic parts of alchemy, inscription, and jewelcrafting opened, and she just has blacksmithing, which... eh? She's back in her Pandaria mog to go with the purple accents in the prot shield.
I leveled my shaman so I could level leatherworking, got through chasing down the Elderhorn, and... I haven't maxed leatherworking yet to actually learn how to make the mount. This is the set that says "shaman" in my head.
So, uh, yeah. My death knight. I picked her first out of the "classes I haven't leveled" group once I was through leveling an alt for each profession. This plate chest is a recolor of the Gothic plate, I think; I like it because the matching boots don't look super clunky on a tauren or troll. I don't haven't the matching pants, and I was originally trying for an overalls look to go with the shovel, so I went with a basic blue plate. I've got a skimpy red mog that matches the blood weapon, but red just doesn't look good on her. Since they redid the models, she's not the right shade of green to match the Warleader set anymore.
Next in the "classes I haven't leveled" group is the frost mage, who will probably hit 110 during the next invasion I'm awake and home for. This may be the only mog I've done with the old Wrath frost resist crafted gear that I've actually liked. I haven't found a cloak I really like for this set, though.
I haven't found a mog I like for the warlock that really matches the destro staff. She's going with "meh purple" right now. I'm sorely disappointed in the lack of void-colored armor now that we've seen the patches of it on Argus - it's gorgeous, the black-black with the purple highlights, and it really should have shown up in the warlock gear, dammit. Or at least some shadow priest stuff that wasn't class specific so my warlock could use it.
Prior to getting her artifact, I had my demon hunter in the Bard's leather set. Once I got them, though, I poked around and found another low level leather set that worked with them.
Yeah, so I had the Night Watchman drop, and someone had to get it in their mog. Once I got the windwalker weapons, I knew it was going to be the monk, with these pants that I really like. I have no idea what I'm doing on my monk, but she looks pretty cool.
I'm not sure I can ever change this mog. I didn't realize how much of this set I had till I started poking around with something for her, and... Yeah. I need to get a Thas'dorah color that matches this, since I like the way the quiver looks on her.
This is leveling gear from the Barrens, plus the base disc staff and probably mid-40s dungeon gear accents.
My troll hunter has a raptor, too, but the bear was out when I took the screenshot. I figured I should try playing BM on at least one of the hunters. I don't really care for the gun, but I have plenty of models I can switch it to. This is the actual Talhide set... except the shoulders, which I used in Duskhawk's mog.
This is mostly level 30s quest gear, and I love it on my undead hunter. She gets to try out Survival, so I mogged her with Gul'dan's staff, since my warlock isn't using it.
Guess which spec this mage is! Mages have some of the best spec-themed mog options.
I've started sending Mabs my extra Argussian Reach and Army of the Light rep tokens in case I need it to get the new races in the next expansion. I think she's wearing PVP gear, since it matched her hair.