These kind of threads both amuse me and irritate me in equal measure because we are all different - yes, even women of 'a certain age'. Admittedly, when I was a teenager anyone in their 20s seemed far more mature and sophisticated, while I couldn't relate to the age group specified here whatsoever because they seemed ancient and a whole other species with whom I couldn't possibly have anything in common.
Now I'm mid-late 50s myself I know differently of course. In my head I feel much the same as I did thirty years ago and certainly don't consider myself past it or middle aged though I know that many would (just as I foolishly did when I was younger). Most of all, I consider myself to be an individual, as I'm sure most others of a similar age do too, with varied interests and indulgences. I have always been disappointed by 'generic' gifts because they smack to me of 'that'll do' rather than some thought being given to what I'd like. They're even worse as you get older because they often include a nod to your age, as if that's all that defines you.
For heaven's sake, if you need ideas, just ask - either directly, or indirectly e.g. by leading the conversation around to hobbies and treats, or by checking an Amazon wishlist for example.
Right now, if I was asked for gift suggestions I'd love books (from my wishlist, which includes social history, trashy zombie fiction and biographies), a hairdressing voucher, a voucher for a microdermal piercing (my previous attempts have been rejected but I'd like one last go), perfume - Molecule 01, a Drop by Issey Miyake, a couple of roses (but specific ones), a Warehouse voucher, an illuminated make up mirror, specific platform trainers, specific Tatty Devine necklaces or a specific cat bed I've seen (okay that's not so much a present for me).
I'd hate to receive a 'safe' accessory in a 'safe' shade or a selection of toiletries I hadn't specifically requested - though I would be gracious about it. But inside I'd probably be feeling very upset that I'd reached an age where I was seen as homogeneous to all other women in their 50s.