I bought the Splat Pack for Carmageddon. I bought all the extra packs for the original Battlefield and Battlefield 2 (if the Vietnam title had any extra stuff, I never saw it... But it was also the Windows ME of the series). I think I have every expansion pack to The Sims and The Sims 2. But they were not downloaded, they came in boxes from a shop. I also downloaded freebie/user-community stuff for the Carmageddons, The Simses and the GTAs of the '3' series up to at least Vice City (not sure if I bothered with San Andreas), but none of that was was DLC in the strictest sense.
I don't shy away from developer 'improvements', as you can see, but I'm also not above freeloading upon (legitimate) no-cost stuff. See also (free) Oolite's (free) user-community stuff. Strangely, though, not so much of (free) DF's (free) mods/graphic-packs though. I seem to have a not entirely consistent approach to these things. I think I just like Toady's vision, raw, but Oolite is community-driven so I'll continue to accept their further optional accessories (but UFO:AI, similarly, I never did). And the older (commercial stuff) can perhaps be put down to a mindset that has changed, but what has really changed there is that I have grown to dislike "must be connected to the Internet" games (especially "buy this largely blank CD, and it'll then download almost the entire base software from Steam... You do have a Steam account, don't ya?" so-called-progress), and have avoided GTA IV altogether.
I also have never had a Console where this kind of thing is even more ubiquitous and necessary, to the extent of being "DLable" through the vendor OS... Unless you count my Android tablets and the apps, for which I follow yet another set of different rules. There's some non-Shop .apk stuff on there, but if that's an exception; as yet I have never bought any 'gems'/'jewels'/'coins', nor paid for a Pro version of a game (Google Play has never seen a whiff of my credit card number, so there's no nasty surprises awaiting me through a miscluck)... Freeloading again, you'll note. Though I may (or may have had to) view ads for things, to benefit some way or other, usually where I'm happy with the package giving me the (non)option to do so, and at times of my (relative) choosing.
i.e. I can see why (modern, commercial, vendor-originating) DLC is good, but it just hasn't really applied to me. Yet I've been reading this thread almost from its inception and seeing an odd mix of attitudes, some of which map onto my own, and I've been trying to work out how to summarise my position. And failed; but submitted it, thusly, regardless... HTH, HAND