I reuse heavily!
I salvage components and attach them to existing builds or reuse them to make akward old computers. Need room for that 3.5" drive? No problem, surely there's a useless part of that case we can remove...
I will upvote your constructive comments, good or bad.
I do not downvote completed builds unless it's a horrible joke with no taste or if it's a fake build. If I cannot upvote your work, I will simply not vote at all.