Not particularly brand loyal in that every few years my opinion tends to change.
Wilson Staff forged irons are what have worked best for me (FG Tour and RM Forged), but in the years Wilson didn't produce forged irons I went to Cleveland and Mizuno.
Drivers are all over the map. Marketing hype might get me to look at a driver but only performance makes me part with my money.
The least loyal spot in my bag is reserved for putters. Pings, Odyssey, all the way back to Acushnet Bullseye. Whatever works.
The area of my game I'm most consistent is regarding balls. Titleist makes good product throughout it's ball line. But for me, they are more the standard I compare the others to and I often don't buy them. I usually end up buying balls that give me similar performance at 20 to 40% less cost. So much for loyalty.
Great product at a solid price point is what I'm loyal to. If cost were no object, the Wilson Staff irons would stay in my bag but everything else would likely be reconsidered.