For awhile I really used every workout in my collection - there were a couple that I didn't like - they just wouldn't be done with any sort of regularity. I rarely bought anything new - kept using the same ones.
And then . . . l found new instructors and acquired a ton of new workouts - mostly due to VF's influence.
And I keep doing that - almost got sucked into buying Metamorphosis due to frenzy. So all of those older workouts - some on VHS - others on DVD - don't use - hardly ever but I don't want to part with them either. I have gone back a couple times to revisit - and I'm glad they are there. I could see myself lamenting that I got rid of them - I don't want that to happen!!!