Games I want the most:
1. Weird World: Return to Infinite Space
2. Alien Spidy
3. Star Wolves 3: Civil War

My favourite card:
Epic Meat Man (from Super Meat Boy) It's epic
http://psteamcommunity.yuanyoumao.com/market/listings/753/40800-Epic%20Meat%20Man%21?filter=super%20boy%20trading%20card

I think people that posts trading threads really want change and get new cards and badges. The same I'm thinking about people that answer under a thread. So, make a list. Take there about 7 of first threads creators. Then look in that threads and take randomly about 5 people that posted a reply. Then you have 7+7*5 = 42 people in your list. After that just choose randomly few winners (or more) (for example: random.org). Not very hard, isn't?