We're undergoing a restructure at work and I'll have a new manager. My current manager has been amazing. We get along like a house on fire but he's great at maintaining professional boundaries. He's been there when I've doubted myself, he's gently guided me and really made me into the person (in a professional capacity) that I am today. I'm incredibly sad that he's not going to be my manager anymore, although he'll still be around.
Would it be weird of me to send him a nice card thanking him for being such a great manager?