Just one for now.

I periodically work on leveling my lvl 35 Stamplar, but I have so much fun on my healer, it's tough talking myself into playing anyone else.

It will be easier once the Stamplar is lvl 50, of course, because then she can earn CP for my healer, and she kills things faster.

2. One is a stam dk and the other is a magicka dk, haha! I have a stamplar that is soon to be 50, though. Once I get him to 50, I guess I'll work on my nightblade.

I get really into leveling up characters, and then I'll get on my main stam dk and not touch them for a long time.

9 over 2 accounts

One currently because I prefer playing low(er) level alts. I've deleted a couple of characters that were close to 50 to make room for new ones in the past.

12 on one account. 1 magic 1 stam and 1 tank of every class. Hope they give us more slots soon!

On EU-PC. Got 4 lvl 50's now, working on my 5th.

Pact:
Stamina DK (Tank) - Old main & crafter
Magicka Templar (DPS, Tank) - Most used character, mainly PvE.
Magicka Nightblade (DPS) - Just hit lvl 50, still need to level skills.
+ Working on a magicka DK.

Covenant:
Magicka Sorcerer (DPS) - Inactive.

9, started on my way to 10, and soon another as well, I'm...an altoholic... ^^'

I have 9 characters, 2 of which are level 50. Most of my other characters are RP alts, so doubt they will ever see level 50

Edit: all on one account

10

Two created and max skilled inno time since dark brotherhood. Race change was to slow. I had to buy two new character slots to fix some choices since zos changed passive and skills.... oh wait... i see what u did there zos. I see.

6, 2 nightblades one highelf and one redguard. got a templar DK and a sorc all magicka.

ive got a lvl 31 stam sorc that i will level eventually and a lvl 11 stam DK that idk if i will level or not.

Technically, right now, 2 - my stamina nb main (which has been level 50/vet rank before the PC->PS4 account copy when consoles went live) and a dragonknight I finished leveling to 50 just before DB came to PS4. Working on a sorc now.

I used to have a level 50 templar that got deleted because I simply dont find the class fun anymore. I used to enjoy templar, but it seems to have a ton of animation and internal cooldown/delay issues that make combat feel extremely glitchy and cumbersome.

At this point I'm trying to use a different role, weapon setup, and armor type on each of the 3 characters. My nightblade main is 7 medium, 2h + bow, completely stamina focused for a melee damage role. My dragonknight is 7 light, inferno + restoration staves, and focused on ranged magic DPS and healing for groups. My sorceror is 7 heavy, Dual wield + 1h/shield, and focused on tanking with more emphasis towards stamina than magicka.

I currently have two Level 50s and three more just a few levels from cap themselves. Once Ive done the vast majority of content for Dark Brotherhood I'll get back to getting them up to cap. Planning on using them to help alleviate the climb to CP 501. Little under half way there now so I figure Im going to need to split up the effort between each character to make it feel less grindy.

If you asked this question Monday my answer would be 10 instead of 8

Now I have 7.

Used to be Five V16, One V11 and another V1, now they're all maxed out in the CP cap...

I made all classes one stamina and another magicka builds, I just don't have a magicka DK which I might get to level now that veteran ranks are gone... xD

A FireMagplar and a Stamplar. Its not the popular wisdom but the FireMagplar as a Dunmer works pretty well. WIth an inferno staff and the Templar skill line there are plenty of fire based skills. And since fire is SO common some resistance to it is very nice to have.