Honestly, I don't let my appreciation of games blind me to the faults of them or the developers. I fail to see what good that would do.
If a developer makes shit I'll tell them it's shit. Doesn't matter if they are the best developer in the world.
But leaning towards fanboyism, in that I'm willing to tolerate a lot of bad decisions (Mind, not if they are intentional) and still like them as a developer, for the games they make?
SNK (King of Fighters, Metal Slug and various other properties), Sandlot (Earth Defense Force) and SEGA (Just about everything besides Sonic and A:CM).
But yeah, no developer or publisher should be expecting any kind of loyalty from me. I appreciate them only for as long as they make things that are good and don't treat customers like walking wallets to be ripped open and then discarded. I have very little patience for exploitive, restrictive and short sighted business practises.
I liked some of Ubisofts games but I no longer buy them because of their habit of releasing broken games with a metric crapton of DLC and insanely stupid design decisions (Mouse acceleration needs to DIE).
I won't buy EA games because I don't like their short sighted restrictive server format, where core functionalities of the game becomes 100% unusable once they drop support for it. Which they do, because servers cost money to maintain. I think that, rather than have them at all, we should just employ systems that don't need them. Or at least have them as an option. Thinking of LAN (Every games should have LAN functionality - No exception), privately owned servers (Not just slots on EAs servers) and split screen.
I stopped buying Starbreeze games recently, because I got fed up with their greed in churning out paid content of questionable quality in lieu of delivering promised free content in a timely manner, imposing pre-orders (Which are anti-consumer in prohibiting critical examination before making a purchasing decision) in the midpoint of the life cycle of the game, inflating prices for exclusivity while framing it as support and for employing crowd sourcing strategies for content already developed, where the value of what you pay depends on how much everyone else spends (And the big winners is the ones that don't pay anything at all).
So yeah, I don't take shit from any developer or publisher.