I've never consider myself much of a loyalist in any MK game aside from MK9.
Through every MK game before MK9, i played practically every single character, Trilogy was much easier because the universal move set was equal to everyone, being Ermac, Nightwolf and Scorpion my favorites in Trilogy, Raiden in MK1, and Scorpion in the MK 3D series.
I think i gained this Loyalty thing with MK9, when i touched the game a 1 week after its release, i played the entire available cast, and stuck to KL and Kitana, then switched to Kabal, only when Skarlet got released and i got her a year after, is where i found myself truly on a MK9 character and trough the time dropped every single character to play only her religiously and learned a lot even against bad MUs.
Same thing happened to SF4 when i played Ibuki for the rest of the game.
Now in SF5 Ibuki has been released, and i already switched Ken to play Ibuki religiously again, although i get to play a few characters to know their ins and outs, i will definitely stick to Ibuki.
If KP3 happens to have Skarlet, i will also play her religiously, despites the levels, besides the variation of KL i use mostly its pretty bad.