If you’re at the dissertation writing stage, your most important relationship (other than the one with your chocolate/peanut butter cups stash) is that with your chair/advisor/first reader. Your chair can be your best friend or worst nemesis. But there’s no getting around it; if you want to get done, finally, and graduate with those proud letters after your name, you need your chair.
When your chair is friendly, forthcoming, and responsive, you may be tempted to become friends. When your chair is too formal and standoffish, you may be tempted to ignore him or her entirely, or as much as the required paperwork allows. Either extreme is a mistake, and you’ll likely regret it later.