I'm re-reading the IDW comics from the start again, and two things struck me (2006 spoilers here):
Wow, this comic had great artists! Milne and Matere were great on Megatron Origins and E.J. Su killed it with the super-detailed but crisp designs in Infiltration and Escalation. Don Figueroa was also fantastic on Stormbringer. I haven't gotten to the ongoing yet but I remember being so disappointed when he switched to a movie-like style. Nick Roche also did pretty well on Shockwave but he needed a bit more time to refine the style. The only real downer was the artist on Spotlight: Nightbeat. I didn't know IDW took MS Paint drawings in 800x600.
The other thing was that they weren't afraid to use a wide range of characters, especially in Stormbringer. Looking back, it's kind of cool to see guys like Whirl and Scoop so early, even if they really didn't have their personalities yet. What's also fascinating is how expendable a bunch of them are. Sure, they're D listers but Stormbringer seemingly killed off like the entire Decepticon Pretender squad and possibly a couple on Nebulos. I know Crankcase turned up again so the others could have made it too, but Iguanus died on screen. I guess the Autobots could have taken the others into custody.
It's maybe one glaring issue with the comics overall to this day: everyone has plot armor until they don't. Starscream gets his torso hollowed out - he's eventually fine. Skywarp also, in plane mode - he's back the next issue. Blitzwing turns into a smoking wreck, I'm pretty sure he returned from that. The Technobots are supposedly dismantled for parts but nah, they're fine. Iguanus gets his arm torn off and dies a sad little death. It makes it very hard to tell if something was a dramatic death or just a flesh wound.
However, it's fascinating how the story made it so far with relatively few retcons, and how they set up a ton of stuff very early, like the Dead Universe stuff and Shockwave's plans, which would take years to play out. I also love how they focus on stealth in the beginning and all the technology like the holomatter avatars. Infiltration would make for a great live action movie. Verity is also the best human POV character, I love how Su draws her. He clearly spent much more time on her than anyone else.