In my case, all my characters are part of my main's clan, as she's a super old vampire and definitely has the funds to have a big, multi-race clan that all help out in their own way. I used to prefer race/alliance being lore friendly but then thought, eh, I'd rather they just all be AD since most of the clan are khajiit anyway. I didn't have the "any race, any alliance" bundle until only recently so I just ignore the alliance they are ingame.