[mgkimsal]

The examples given so far don't necessarily translate to situations where I feel devs should feel guilty/bad, but there are situations, and I've left some messes behind in my day, often which I wasn't aware of at the time. I've taken over projects where the dev(s) should have known better, and in some cases did know better than what they delivered.

If you never feel guilty/bad about any code you've ever left behind - never - there's something wrong with you. You shouldn't go through life apologizing for every line of code either, but there's a balance to be struck somewhere that probably shifts over time.