Yeah, Themes were a definite highlight.
I'd also say that the Eladrin Knight build was cool (January issue, IIRC), even if I disagree with the restriction to one race only.
The White Well fey pact for Hexblades was pretty cool. The star pact Hexblade was neat as well (November issue).
The Battle Cleric Options article from D400 was good.
D397 had some good articles in the fluff camp with Faith & Heresy, and the Unearthed Arcana one on Henchmen was neat.
Bards of Wolfstone from D396 was good.
D395 also had a good Unearthed Arcana on building strongholds. The costs are a little ridiculous, but it's a good starting point.
D391 featured a fluff/crunch article on Staff Fighting, which was cool. Also had the now-infamous Pyromancer mage build in it.
D390 has [MENTION=607]Klaus[/MENTION]' excellent article on The Shivs of Sorcery.
I know there has been more cool stuff, but I can't remember it all at the moment. Those are basically my highlights from a quick browse through my Dragon folder from the past 12 months. Some of this might not be news to you, but I don't know when you unsubscribed.