When I'm browsing a particular user's synths, I would love to be able to search just their synths for a keyword or keywords.
Ideally, it could be the same sort of wordwheel that Facebook uses for users in their search where it will match the letters you've typed thus far against any portion of the words in someone's name, etc. irrespective of whether those letters fall at the beginning of a word or in the middle. Even better is if the list of synths on the profile were sifted in real time with all the synth cards that don't match the query disappearing.
Difficult to implement?
I suppose it must be.