If the games helped you through a tough time and have a lot of meaning to you, I don't see any reason to not go for it. Yes, you may not be as in touch with the game years from now, but it made apparently made an impact on your life. However, nobody can make that choice but you.
That said, if you do go through with it, I would personally go with Garrus' Archangel symbol, but it's your choice.