In my mind, the concept of being "loyal" to an sp totally defeats one of the best reasons to hobby in the first place, namely, the variety. At least, that's why I do it. But I am aware that everyone has their own motivations for what they do... some like the security and confidence of going with known entities. I personally like the adventure of the unknown, especially when the worst possible thing that could happen is you get to have sex.
That being said, there are a handful of sp's at any given time that I would consider in the "rotation". Over time, sp's move in and out of the rotation, and it is rare that I see an sp more than 4 or 5 times at most. Overall, I am generally looking for new blood at all times.
