12/12, here. 6 EP (1 of each class), then 3 AD and 3 DC.
All are lvl 50/cp810, except 2. 1 lvl 4 AD and 1 lvl 4 DC. I'll get to them, eventually...

Played a NB since headstart and made a Necro with Elsweyr.

9

6 magicka as I prefer staff playstyle, and 3 stam to have some variety and test other classes.
Dropped a 4th stam already, not my playstyle, and wrong alliance since faction lock.

Use them in PVE mainly to have crafters for daily writs, delves, bosses, and 6 of them in cyrodiil for fun and transmutation crystals.

Was never a big fan of PVP, but meanwhile enjoy cyro now and then, so will turn one into a PVP char lateron (first want to reach more skillpoints to be able to do more crafting writs).

I use different classes, but similar setups, so they are not 100% optimized for their class. I tried it different before, but got confused when every toon has different skills on the buttons. Now every magicka toon (sorc, warden, templar) has the same skill on the same button (more or less), making my fights more fluid.

Magic and stamina version of all classes
5 high elves AD including a templar healer
4 redgaurds 2 DC and 2 AD
1 breton magplar DC
1 dunmer mag warden EP
1 imperial stam dk AD
1 orc stam necro AD
1 Nord dk tank EP

1 redgaurd NB dc on eu server that I rarely play

I mostly play my main high elf mag sorc and redgaurd stam templar most but sometimes pick a random one among them to play besides all of them are fully maxed and geared.

36 currently, across two accounts and in the case of one account on both regional servers.

I enjoy the leveling/questing/story aspects of the game and have no interest in what is commonly called "endgame". For me the most enjoyable part of any MMORPG is the first two-thirds of the leveling process, after that it all becomes a chore.

All my characters are different in various ways. As a non-competitive solo PvE player I am not limited to things like "magicka or stamina" and have no regard to, or knowledge of, "meta" builds (or anyone else's builds generally). I might have a couple of characters running the same balance of attributes but one might be focused on class skills while the other might be focused on guild or weapon skills, for example. The beauty of the game is that there are so many different ways in which a character can be developed, and the world has now become so large and accessible that even if I do run a character fully through a particular zone's quests the likelihood is that it's been a year or two since I last did that so it feels fresh once again. Moreover, having played without a break since PC launch there are still a few zones and DLCs I haven't really started let alone completed.

The other main reason I play multiple characters is because it prevents burn-out, and in those games where I have concentrated on a single character I have invariably found that logging in every day and pursuing the same character doing more of the same thing each time very quickly feels more like a job than a hobby.

My playstyle isn't everyone's, but it's far from being unique.

I have eighteen currently. I have more concepts for characters, yet there are no more slots available, and I am hopeful for new classes to be introduced that would fit them.

PC EU 18 characters
PC NA 14 characters

I need more character slots

7

Altmer magsorc (main)
Dunmer stamblade
Breton magdk
Bosmer stamden
Khajiit magplar
Altmer magcro
Nord stamdk

All belong to their own alliances

I have 7, and it's because I like coming up with different character concepts and having options for what I play and how I do it when I log in. I try to make sure they're all doing different things (e.g. if one is completing a zone all the others will be elsewhere...but not all Elsweyr) and they all play differently too. (It also means I can do things like leave 1 camping a boss in the Imperial City for easy tickets and still be able to play other areas of the game.)

Khajiit templar
Breton warden
Argonian nightblade
Nord dragonknight
Dunmer sorcerer
Imperial dragonknight (crafter)
Bosmer necromancer

I may well make more in future too. I have an idea I really like for another necromancer, but the most interesting part is her personality and I'm not sure that would come across in normal gameplay, and she's not a nice person so I'd be reluctant to RP her with other people.

7 that I roleplay as the same elf. Same race, looks, name (just minor variations required by game), mount, pet, outfit. 4 mages and 3 archers. She treats changing from one class/spec to another as casually as she changes her hairstyles. Just a matter of deciding how she wants to go adventure that day.

Then I have a tank. He is a different character since being a tank was just a 'bridge too far' for my little elf. His purpose is to help the little elf learn by observation what it is like to be a tank so she can better support tanks when she is a healer or dps.

9 on PC EU, 3 on PC NA, and I also have a second account with one character on EU.
On my main PC EU, I have one or 2 of every class/attribute combo I liked, on PC NA, I have one of my favourite classes each (StamBlade and StamWarden) and a crafter/tank.

Technically I have some more experimental characters and chars to save names, but I don't count them since they'll get deleted at some point.

36 across 2 accounts on NA

18 on NA
5 on EU