I'm a big fan of the PDF market, and have made a few purchases in it.
I've picked up the MPC I & II, Big Bang, Hell on Earth, Modern Backdrops, plus Blood and Fists and Blood and Vigilance. I've picked up several other assorted d20 Modern related and un-related things also, such as a few Microtactix building/accessory sets that I'm quite fond of.
But I have access to a very good printer that prints duplex, so I make myself a book if I like the stuff enough. You can usually tell the ones I like the most because the are printed in full, in color, and bound (the MPC and Blood and... books, namely).
Even if I didnt have access to good printing facilities, I would still use the PDF's; sure I love hardbacks, but there is nothing like being able to afford to check out a variety of things with your gaming budget. Plus, when I was without printing support for a while early last year, I took a few things to Kinkos and had them printed. The total cost was still a good bit less than the price of a hardbound. I still pick up hardbound books off the shelf, but usually only after I've had a chance to get a good look at someone else's. I'm much more likely to grab your $5-$10 pdf on a good review than a $35 book that I havent seen.
Plus, there are some very, very good authors and researchers working on the PDF's nowadays, and many of them are very easy to correspond with. The guys in TGM have worked on several games that I've played and loved (including Star Wars d20 and d20 Modern) plus guys like Rich Redman, Stan!, and others make their way to some of the forums, Chuck Rice (Vigilance) produces *very* good quality work and is one of the most accessible game authors I've ever met, Dana Jorgenson (Big Bang) may be a bit irascibleon the boards at times but he has a darn near encyclopedic knowledge of firearms and artillery, and is also quite accessible on the various forums. All of these guys have been very kind and helpful to me in my various games at one time or another, all for the price of an $8 pdf.
Not that the current WotC guys, or other hardbound gamebook authors aren't good, but I've noticed a bit more... espirit d'corp, I think is the phrase I'm looking for, among those that publish in the smaller end of PDF's.
Just my 2 cents, on sale next month at RPGNow.com
BTW,
malladin said:
<snip>...but I've just aquired Hell on Earth and am sturck with lots of WW2 campaign ideas (mainly involving Nazis and demons... <snip>
I'm using that one to supplement my own WWII Supers campaign right now (SH in sig below). How'd you like it so far?