No, I don't think it would have made any difference TBH.
If I said "What would you like" she'd have said "Nothing"
(This was in the early 1970s) .I'm 45 now.
We wanted to give presents to G/P because we didn't see them very often.
But it was the way she was so delighted with my sister's presents, my older cousin and my uncle- they could do no wrong.
My G/M used to sent things to the older grandchildren but not the others.
Remember those little Robertson Golly things that you had to save labels? They took forever to save up. But regularly a parcel arrived for my sister and same with my cousins.
There's lots of other things she said and did, not related to presents. But when I was at colledge , my cousin (the non favourite) and I lived nearest out of the family. So we did alot of the legwork (and my mum as well.My uncle made the odd visit, like the King visiting
. )
And even doing this, it didn't make her nicer to me! By that time I was older, so didn't really care about being liked by her.
My sister though sys she found it a burden being the favourite one
.
One of those 'family' things.
Now if I'm buying presents, I ask for a list/ideas or give vouchers.