As someone with only a little over a year of experience, I don't have the luxury of bagging 7 different Teebirds in various states of wear. My oldest discs are only a year old. For that reason, I was drawn toward brands that had a complementary lineup for each of the different speeds. For example, I throw Dynamic fairways because the Escape was a disc I clicked with easily, and the Getaway and Felon complement it well. Also, the fact that Trilogy plastic beats in easily is a positive for a relatively new player, since I can see a disc's lifecycle much more quickly than I would with Innova or Discraft. So with that mentality, my brand loyalties are:
Fairways - Dynamic
Mids - Dynamic
hyzerflip discs (Tursas, Hatchet, King) - Westside
Control drivers - Axiom/MVP
My putters and distance drivers are a bit of a hodgepodge with no real loyalty.