I don't buy an actual present as I have a dh and he's very good at choosing gifts.
However, a couple of years ago when dd became a teen we started doing stocking for myself and dh too and I ended up selecting and buying all the stuff for my own as well as his and dd's.
This year I've asked dh to do mine and I'm happy to give him some hints but he also needs to get a couple of small surprises too, just like I do for his.
I think that having a nice, thoughtful gift - whether it's from you family, partner or from yourself is really important. And it's really not about spending a lot of money, but it's about feeling 'seen' and thought about and a little bit spoilt by those who love you.
Even in years when money was tight was have always marked birthdays and Christmas with small but personal gifts. I like that it helps me and dh to think about each other as people rather than just dh or dw or mum and dad.
I am not a fan of household / practical gifts for this very reason but I get that we're all different on that score.
I also think it's important for dc to see their parents get personal gifts no matter how small as it distinguishes for them that we're also people in our own right and not 'just mum' etc
So I wholeheartedly encourage you all to buy a lovely gift for yourselves and put it under the tree!