I still really like the ludum dare system where people how rate a lot of game tenmd to buble up at the top of the list, encourage everyone to rate. It's quite common for people to wonder how to make their game more visible and with this system the obvious answer would be "go and rate games". The main draw back is that it might encourage some people to randomly rate games without relly playing them.
So I'd love to have the default filter being semi random, with game entries having a weight based on the ratio rate_given by rate_received
Would be also nice to have a text filter. A simple text input and when you type it filtered out games that doesn't contain the string in the properties of the entry (name, author, platform etc.) I can do that already with the search field in the brwser but somehow I would find it more convenient as a filter option.