Disagree Dr. Who is not top 50 material and I do believe I owned yours snyper plus just got rid of my second. It's fun, but not top 50 fun. Top pick would be Mystery Castle. It has a great theme, great art, unique features, and while not super deep is the only alvin g with any real depth to it. Radical would be my second pick. Unique layout, killer art and sound. Not top 50 but top 100 would be Avatar LE.

I think it should be based on number of votes and age of the machine. Problem with rare titles is that so few play them even after 20 years that they will remain buried at the bottom of the lists. On the other hand I don't care if 200 people vote for Iron Maiden because it usually takes a good couple years before people fully explore the game and decide if it has legs or not. Everything new is automatically good and the more terrible game the faster it plummets from the top 10, but it can still take ages and some people never rescore it after their first experience.