I have read a number of guides on shrink and used this program a great deal backing up my DVDs. However, I have been seeing some conflicting advice when it comes down to choosing smoothness and sharpness. From my own experience with shrink I have noticed several things; animated movies seem to always look good with max sharp regardless if it's below 60% compression, movies with lots of digital special effects look better with max smoothness. For regular movies, or old black and white movies , I'm never sure which to use. Is there a general rule of thumb like "greater then 60% compression use max x, less then 60% use max y"?