Do you watch DVD special features?

I basically never do.  Maybe I'll watch the trailer or something on a movie every once in a while, but I almost never watch behind the scenes or interviews or anything.

Only some deleted scenes.

Only if they are worth watching, like the Lord of the Rings and Star Wars DVDs.

i always play through the deleted scenes, normally they're awful though :(

Depends on the movie and features. I'm not really interested in behind the scenes and stuff like that, but I do like deleted scenes and alternative endings.

I'll usually watch "making of-" extras but not much else.  Usually depends on the film, like for Donnie Darko, the deleted scenes from that movie were all pretty neat and clarified a few things.

If its a film I like, most of the films I own, then I will watch the special features. I love to watch making of's, deleted scenes and similer things. I also rather like Audio Commentary, especially the Red Dwarf commentary (British Sci-Fi Comedy) which has the principal cast hanging out and telling production stories. 

Actually, I do watch everything on the DVD (other than watching with the commentary).
Otherwise, what's the point of buying / renting a DVD?

I always watch them for animated features. I find the whole creative pipeline there fascinating, and its funny to compare how Miyasaki runs his sweatshop (literally, their hours are insane) to a Pixar film.

I watch them a lot less often than I should, because I almost always enjoy them when I do. Same goes for "special edition" features in video games.

I do.  I watch all the special features on DVD/BD.  Only thing I don't watch is the entire film with director/cast commentary.

only if I really like a film, will usually watch the making of stuff.
 
Though there are rare gems of audio commentaries, my favourite was watching 'This is Spinal Tap' with the audio commentary because it is done in character so it added a whole layer of jokes, reflections and insights (obviously all fictional) that was just as hilarious as the film itself.

" only if I really like a film, will usually watch the making of stuff.
 
Though there are rare gems of audio commentaries, my favourite was watching 'This is Spinal Tap' with the audio commentary because it is done in character so it added a whole layer of jokes, reflections and insights (obviously all fictional) that was just as hilarious as the film itself. "

I only really watch the special features for movies that I really enjoy, or are made in a special way (like Pixar animation). I hate watching deleted scenes because they generally suck, which is generally why they were deleted from the movie. 
 
I do have to give up the best "special features" section to Lord of the Rings because it's fucking amazing.