Notwithstanding CPU, disk i/o, and memory issues, how would you feel if you knew or you discovered your VPS container was on a server shared with several hundred and up to a thousand other VPS containers?
Like I said, I'm not really that concerned for feelings about resources issues, but more interested to see what people's emotions are on the subject. For the scope of the question, consider that you would never have cpu/disk/memory issues.