I back a decent amount of stuff on Kickstarter, and I really, really, really don't care about little doodads. I spend enough time agonizing over where to put various nerdy tchochkes I bought years ago and packed away during moves. For me, more of those are just more problems.
I also don't care very much about ribbons, different covers, that sort of thing. If I'm pledging for a physical book I just want the book.
What I do really love in a stretch goal, though, is more content of any kind. I'm good with that being more art or text in the main book, or additional material as PDFs. Or a map (again, don't care if its physical).
I get that stretch goals can muck up a campaign pretty quickly, and I truly hate it when backers get entitled and whiny about them. No matter how many people remind them that stretch goals are a treat, they'll show up in the comments griping away. That said, I think when stretch goals are feasible for TTRPG creators, they really do amp up the enthusiasm, and satisfy those backers who see Kickstarter as some sort of combined team- and spectator-sport. I'm one of those dummies who checks in on campaigns I like, but not enough to back, just to see if they've hit the next goal. Some will surely disagree but even if those goals are as simple as "two more monsters" or "a half-page of story seeds" I think they still go a long way.
(Oh and VTT support is awesome, but that market is so fractured it's hard to tell how much of a plus that is for the overall audience. Even some tokens, though, are appreciated.)