Major Handwaving

It's funny to think about. When I was a kid, I knew exactly what I wanted. Books, games, clothes, I knew which ones I wanted and would compile lists for my parents that contained probably 20 items or more. While I never really felt bad about not getting some of them (20 items is a lot), I've found that as I get older, I can't do that anymore. For Christmas this year, I could barely even think of 3 things I wanted. Granted, they were more expensive items, but even coming up with those three took quite a long time. For my birthday, I can't even think of one item. I'm caught between wanting a new gaming pc, or a new phone, or a new server, but that's all I have. I no longer wonder why adults give each other clothing and socks. If I can't think of anything, what could my parents think of?