I love Naomi Novik's Temeraire series and practically inhaled the first four in the series as fast as I could grab them. Then the fifth was released as a hardback. I haven't read it. I'm waiting for the paperback.
Same with Patricia Brigg's Mercy Thompson series, the fourth book of which will be released next week. In hardback. I won't buy it unless I can snag a cheap used copy. I'm waiting for the paperback.
I used to prefer hardbacks, but that was back when I worked for a big used book store and could choose the best copy of any book I wanted. Now I prefer paperbacks because they take up so little shelf and moving-box space. Plus all but the doorstopper epic fantasies (which I loathe anyway) fit in my purse or jacket pocket. And they're a lot cheaper.
Frankly, as a reader I'm annoyed when I have to wait another year or so for a paperback version of a book that's already been released. I know the publisher's just hoping I'll break down and buy the hardback for lots of extra money. I'm much more likely to buy a copy used and then not buy the paperback at all. Which doesn't benefit anyone: not the publisher, not the author, and not even me, because I've still got a big fat hardback taking up shelf space.