Maybe extending to 5 tags would do the thing. Or no tags at all.
in Requiem, there is enclave, player driven faction. They have to gather, craft.. like everybody else, but they have special base and rank before their names. Their roleplay is based on kill everyone.
We should be able to join all factions simultaneously and become the Leader of them, too.
Skyrim?
There are allot of games who have this approach. Most roguelikes, all elder scrolls games and plenty of rpgs (or games with rpg elements) use this.
in morrowind, I do believe you couldn't join all 3 of the houses .Trolololol.But I do like the idea, of maybe, loner trait giving another (1) tag skill.+10% experience is complete crap, though, I suppose if you're just some 1 ch build and all it might seem nice, but still.And of course, to balance it you'd have to take off the +10% exp.
I think Loner trait could be used for that. So if you picked Loner trait you could tag one additional skill.