One of the most important aspects of a tabletop roleplaying game experience is finding the right group for you in the first place, so I think any refinements to the search system would be a welcome addition for many. As is, searching through the game ads can be extremely time consuming just in terms of scrolling through a bunch of completely irrelevant results. A couple additions in particular seem like they could do a lot of good immediately, especially since pretty much all of these already have a variable in the system (you just can't search by that variable): 1) As is there's a flood of ads for players looking for a DM... something you're probably not interested in if you're a player looking for a DM yourself. As such, I suggest that searchers be able to check whether they are looking for a DM, or for players. 2) Search by number of player slots. After all, some people would prefer a more intimate game of 4 players or less to a larger group of 8 people or more, or vice versa. You could also more easily locate things like West Marches-style games or RP groups (that aren't actually games) by searching for large numbers of player slots. 3) A check for homebrew worlds or campaigns, as opposed to published settings or modules, could also be useful. 4) A check for one-shots vs not. 5) The ability to sort by newest ads, or possibly even the ability to exclude listings that you have already viewed (as in, clicked on, not things that have just previously popped up in a search).