Vouchers and experiences that give someone a proper outing rather than another object they need to find space for. A brewery tour. A driving experience. Tickets to something he actually wants to see. A meal at a restaurant he has mentioned. These work because they give him time doing something he enjoys and often include a memory with other people rather than just a thing. The value is in the doing not the having. This is the gift category when you know someone well enough to understand what he would genuinely choose to spend his time on.