i'm loyal brand wise but mainly it's related to whether or not that company treated me (or the shop i worked in) well when i was in the trade.
good brands for me, orange
, giant, silverfish meaning rocky mountain, santa cruz, kona pre paligap when imported by 2nd level, gt bitd b4 caratti went in halfrauds, yeti, dmr and others i can't think of!
bad brands for me, felt, kona by paligap, cannondale, gt, mongoose, cube
the bad brands for me meant that i would never ride those brands again because i felt so badly treated, it wasn't just they went into the mailorder shops etc that helped bugger up our trade it was that the reps lied about it and said they wouldn't do it then it happened and they tried to justify it to us as a better thing. or when the importer played shops against eachother to try and get more business then end up losing business coz they pissed both shops off! except for cube where i knew the guy importing them and he got stitched up by cube when they went to hotlines which is effectively chainreaction and bypassed him. that was just rude!
sorry didn't mean to rant but i just like to explain my thinking so people don't think i'm just saying i hate something with no personal justification for it.
the bike trade behind the scenes can be awful and 2 faced, but i find the good companies are staffed by very good people and are absolute diamonds
had to finish on a positive note!
and remember this is just my opinion, i don't mean to upset anyone!