I know it sounds minor, but good cycling facilities is a big one for me nowadays. It's become my main form of exercise and I wouldn't want to give it up for a job just because there were no showers and no where to leave my bike.

Don't get the issue with the flagpoles and fishtanks. Don't see much in the way of Flagpoles in the UK, but I've worked places with Fishtanks before and they've not gone out of business.