You'd think so, but research suggests that isn't the case. There was an interesting psychological study recently that showed the best gift (in terms of how happy the receiver is) reflects the personality of the giver rather than the recipient[1]. You might not mind, but other people do. And obviously it depends hugely on the situation, people involved, relationship, etc.
> There was an interesting psychological study recently that showed the best gift (in terms of how happy the receiver is) reflects the personality of the giver rather than the recipient
That's great, but you claimed that your partner wouldn't like it if you try to predict what they would like. The link you provided actually says the opposite: that people say they prefer gifts tailored to their preferences, which means they wouldn't mind you predicting what they'd like, contrary to your original claim.
Well, that's definitely one for the "suspicious until replicated" bin. They generalized all that from asking people to buy a single song off iTunes. Off the top of my head, people are better judges of music quality in their preferred genres. There's also not much to distinguish "a song bought from iTunes that I like" vs "a song bought from iTunes I think you'll like" in terms of thought invested, allowing smaller effects to dominate.
I suspect if you broadened the scope even a little, the effect would reverse. How about beverages? Alice likes coffee and hates whiskey. Bob hates coffee but loves a single malt. What should Alice and Bob get each other for Christmas?
[1] https://digest.bps.org.uk/2015/07/31/what-weve-been-getting-...