My sister and I started gifting us with bons a while ago, and are really fine with that. She is gifting me bons from my favorite roleplaying and games shop, and I am gifting her with bons from a Make up, parfums and Co shop.
Buying her a parfum, without knowing if she likes it would be stupid, but she likes parfums in general, so she is happy. And expecting her to get into my SI of roleplaying, with tons of books and materials, would be weird, but I am totally fine with buying it myself on her behalf. ^^
Among friends we usually only gift minor stuff like cookies or chocolate or some X-box points, so its not that hard. The real cool presents, my partner and I get from ourselves, so if my partner knew, that rocks would be the most awesome thing for me to be gifted with, he would do that. But if our gifts were very weird, we sometimes lied to our family, what we have been gifting to each other. ^^ So he gifted me once with an epic mount (an riding animal in the game WoW XD ), that I really, really loved, but I think, its hard to explain that to parents. Similar to the old millenium falcon Lego model and so on. ^^
This year could be a problem again, I organized for my partner something similar to this. ^^ http://gawker.com/5917829/this-homemade ... -come-true
A playstation would have been as well cool, but they were released a month later at our place, so they are still sold out everywhere and I think he would not be happy, if I tried to wrangle in twelfth pregnancy week with a mob, about a playstation. ^^ (Normally, I would at least try it.)