Boston (WBZ Newsroom) -- A few words about one of our esteemed and valued colleagues. Paul Sullivan, recuperating from his fourth brain surgery for cancer, has decided against returning to his nightly, top-rated talk show on WBZ. It's not a question of how he's feeling these days, but he says right now, his health is a priority. Sully will be back next week for one more show, and he'll be an important part not just of our legacy, but of our future: contributing commentary, observations and attitude for some time to come. A letter from Paul Sullivan: To my friends...