I dislike hearing that a game coming out wont get any post-game support: whether it be DLC. updates, or whatever. I LIKE giving more money to a dev to get more content for a game I enjoyed, but when a company says "you're getting this game 6 months late with no fanfare or support" and then turn around and blame the console they half-assed it on, I dont want to support that dev.
If there were actual reasons for not supporting it (the Wii was impossible to make DLC for, for example) i'd understand. I'd rather just wait a year or so to get the "complete" edition (see Arkham Armored Edition) if they dont plan on supporting the initial release.
If microsoft came out and said "we want to make Halo 5 a complete game at launch, so dont expect dlc" i'd be happy knowing 100% of the effort went into the product im buying. If they then said, months later "surprise! Here's dlc!" (like mario kart 8) I'd be excited!
I dislike the nickle-and-diming approach that modern dlc seems to be heading (for the most part, nintendo is taking the "expansion pack" approach) and that actually has hindered my desire for the Xbone or PS4.
The idea of both me and a friend having to buy the console, subscription, game, and all the dlc separately to play the full game together, not in the same room, seems silly to me at best. And since the content-to-price ratio is not where i'd like it (SFxT comes to mind, or buying styling gel or something for assassins creed gear) i usually opt out, despite wanting the content