I've read Dragon off and on for 25 years. Nobody's ever agreed on what should be in it, and that's probably good. Keeps the editors on their toes.
All the good, crunchy stuff available on the web has made all the gaming magazines a lot tougher sell than they used to be. Dragon is usually still pretty good.
Ideas that improve my game, mostly as a DM, are the primary things I look to Dragon for. Whether that's a rules technicality, or an inspiring plot line. And since inspiration can come from anywhere, there isn't much that I ignore.
There was a time early on when I liked that they covered all TSR's games -- not just D&D. I've wondered whether becoming a broader d20 magazine would serve them these days, but I kind of doubt it. Too much else out there, and most people seem to focus on one game.
Overall, I've always found the most value in the generic, mildly crunchy stuff --anything that can be incorporated into an average homespun campaign. Super specialized stuff specific to a particular setting usually doesn't do much for me -- although there have been times where Dragon's articles on some setting inspired me to add an element of that setting to an existing campaign.
I'm kind of overwhelmed with prestige classes and their ilk.
Endlessly rehashing basic how-to tips doesn't help me much, but I know it's good for beginners, so I'd hate to see it disappear from the pages. And reading them has occasionally brought me back in line when I start losing sight of the basics.
Fiction has always been a love it or hate it facet of Dragon -- with most hating it. Now that Paizo is resurrecting Amazing Stories, I'm guessing you'll see most fiction drop out of Dragon for the foreseeable future.
Comics? Depends on the artist. JD Webster set the bar pretty high. Except for Aaron Williams, nobody else has ever really raised it. I do like Foglio. Moseley, I can definitely do without, and I never could get into Darlene's or any of the other serious comics.
zog