How often do you view extras on DVD's?
I remember one of the huge selling points of DVD's back in '97 being the ability to have extras on the disc. However, after almost 2 years of having my own DVD player, I've found myself almost never watching the extras - the alternate endings on 28 Days Later being the exception. They tend to be more than gimmicks than anything.
I would much prefer better transfer quality, such as Criterion and Superbit titles, or barebones widescreen titles to the ultra megapacks with ten hours of extra footage and crap.