I disagree! I'm a DVD-R fan!
DVD+R was designed as a recordable format, and was a redesign of dvd-standards to allow more error recovery when burning the discs. a DVD-R has to be burned near perfectly in order to work correctly, but as far as i'm concerned, if something's worth doing, it's worth doing perfectly.
If you want the best compatability with standalone dvd-players, playstation 2's, early version xbox's (newer ones play +r's fine) and basically anything besides a pc, -r's going to be the way to go.
Think, if when cd-recorders first came out, if instead of making cd-recorders accurate enough to burn cd's that would play on cd-players that were realeased before the cd-r's, they just made a whole new format of cd, called cd+r, which just allowed sloppy cd-recorders to 're'burn bits of data that it screwed up, rather than starting all over. That's what a dvd+r essentially is, that's why dvd-players that aren't specifically trained to 'skip' over the bad bits of data wont play them, and that's why they're not compatable on older dvd-players, and that's why they'll never be as compatable as dvd-r's.
-R for LIIIIIFFFFEEEEE!! I want to know that every bit of data on my disc is correct! DVD+R is just a product of america's increasing ADD and lack of patience to burn a dvd at slower speeds, correctly!!!
Oh, and also, that's why when you burn a 4.7g dvd+r, they only give you about 4.4g of actual storage space, is because they're accounting for all of the mistakes it's gonna make all over your nice new disc!