Not at all, not at all. My fav was
Headhunted, though I felt all except the first two or three were really bloody good. Aaron D-B (author of
One Hate) has another book out just now;
Cadian Blood, which I'd read just back in November, it's also a good read. Not awesome, but damn fun.
Parker, the author of
Headhunted has a few books out and is working on a second 'Deathwatch' novel following on from (well, with the same team from) the story in
Heroes, which should be quite cool, I hope!
Myself, I'm working through the
Time of Legends books (of the Warhammer Fantasy stuff), and on
Empire just now. Not McNeil's finest hour; quite dull I found.
Anyhow, for my hopes: Next year has a ton of
Horus Heresy stuff coming out (inc. contributions by McNeil, Abnett, Swallow, Thorpe and Dembski-Bowden!)
As for
Renegades, I hadn't thought of it like that. I took it to be a great (and tragic) story through it, but that the final page was 'stupid'. (E.g. "Hooray, we're renegages; oh dear, well...we'll have to go to the Eye and become Chaos now too, woo!"

.) If you can get a hold of Gav Thorpe's other books, I imagine you might enjoy them.
Angels of Darkness is a great 'un (obv. about the Dark Angels space marines), with his
The Last Chancers omnibus featuring the 'adventures' of folks in a Penal Legion (think Dirty Dozen + 40k, written in first person).
Anyway, plenty of good stuff out there; glad you enjoyed
Heroes of the Space Marines, it's a fine anthology. Most of the authors in there have a blogs online too, a quick check oughta reveal 'em (or check the links in my own blog, below, a ton of them are in there).