I've rifled through a lot of games this year but Elvira and Jurassic Park have been ones that came in but haven't turned over yet and remain off my list of turnover candidates. At this point I would consider them keepers for me which typically means greater than 12 months shelf life.
Elvira in particular ALWAYS gets top votes when I have my buddies over to play. They spend the most time on it due to its approachable nature, clear shots and ruleset, humor, theme, and difficulty in achieving what would seem to be easy goals. Its my favorite game in my lineup as well. I love it so much it will be getting that crazy expensive topper!