This question isn't designed to incite fanboy wars. It's not about what you prefer. It's about brand loyalty, which is a legitimate and very serious question that concerns all companies.
So the question is- Are you loyal to any particular brand in the video game industry and if so, how do you justify that loyalty? How much rationale is there behind all that trust and loyalty?
I've come across all kinds of people. I've encountered those who will buy a Sony TV and I'll ask them why and they'll just shrug and go, "It's a Sony." Then I've met those who are unbelievably meticulous about their purchases, and when they've found the brand that seems to deliver everything they want, they'll stick with it until the day they die. Either way, regardless of how you go about it, we may all practice brand loyalty in one form or another.
When it comes to gaming consoles, I've always said the same thing- I don't care about the manufacturer name on the system. Give me games I want to play and a console that works, and I'm good. However, as time goes on, you become an experienced consumer. We each have different experiences, though, which is why there are differing opinions on various brands. I fail to see how anyone with a functioning brain can remain solely committed to Microsoft after two consoles that are the equivalent of hardware train-wrecks. Like those who, without thinking about it in the slightest, fork over the money for their fifth Xbox 360.
Something isn't right with those people. Wired are crossed somewhere; or rather, those wires aren't actually connected. But anyway, there are plenty of reasons to like one manufacturer over another, and to like one developer and publisher over another. Subjectivity is indeed a major element, but I don't necessarily believe in trusting one brand over another just because last time, you were pleased with their product. Me, I just like to do all the research necessary for the current product in question, and then factor in the history of that company, coupled with my history in dealing with that company. Makes logical sense, I think.