When it comes to buying gifts for your boss, it's important to consider their preferences and interests. If you're not sure what they would like, you can always go with a classic gift, like a nice bottle of wine or a gift card to their favorite store. If you know they're a fan of a specific sports team or hobby, you could get them something related to that. Another option is to give them a thoughtful handwritten note or card expressing your gratitude for their leadership and support. Whatever you choose, make sure it's something that shows you care and appreciate them.