I committed a cardinal sin of sports writing when I quit my job. I quit on a Friday, about four hours before kickoff on a busy night in October. Wasn't planned that way, at all. But when you have had enough, you've had enough. It wasn't until I was walking out the door to my car that I realized it was Friday and that I was leaving my staff (I was sports editor....errrrr content coach) in a bind. I didn't get a chance to tell them goodbye (not that night at least), nor did I tell anyone in the newsroom goodbye. The only person I talked to on my way out was the executive editor and it was only to turn in my notice, my phone and my badge. I don't think I said a word to her outside of "the password to unlock the phone is...."
There are times I regret how I did it, but I don't regret doing it. I just felt really bad for having stuck my friends with a lot of extra work on a Friday night (and the subsequent weeks to follow), but they all understood my frustration and we're still good friends to this day. It was a toxic environment and I had to get out of it. I'm better for it.
As far as a co-worker leaving in style, a guy I worked with many, many moons back went out with a bang....literally. He had made up his mind that he was going to quit, but hadn't told anyone but me. On the last night he was scheduled to work, he sent our boss home early, saying he'd finish everything up for us. Well, he did more than that. Let's just say when the early morning people arrived the next day, he and his girlfriend were found in a sleeping bag on the newsroom floor. They were both naked. He didn't get a chance to quit, obviously. When I saw him later that day, he told me all the places he and his girl had fooled around (included the publisher's office, on his couch). I never looked at that newsroom the same way again.