My 1st pc ran into Valas and Amon at the same time. Her being a female (rare) follower of Selvetarm wasn't the most graceful of meetings. And I had no clue as to the social dynamics of the server at that time at all. However, I did RP that to try and stay away from those two.
With Cythis, he was a Loltholite, it just works out better that he associates with House Mori'hyanda. The other House was not even around to my knowledge at the time, however apparently they were, just incognito.
The reason why I am posting this is, because I am trying to shine how a person's experiences will either help lead them into a House or detour them from associating with other players.
Out of House Mori'hyanda, we are RARE ever all on at once. Usually as of late, it is me, Istinid, and Elighn. I can almost bet when I sign on I'll see one of them. I can only assume the other House has the same issue, unless they are all from the same time zone. So I don't see alot of House members running around, I would disagree with that.
But what is to say that the Conclave and Charnag can't start trying to recruite? Honestly I think that is really what it comes down too. Loltholites have an advantage when it comes to healing. Wizards are in both groups, but there is always other Drow God/Godesses.