questions: does she actually want a geeky ring herself, and would such a ring suit her tastes? don't want to rain on your parade, but she's going to be the one wearing the thing, and it will be around her friends, family, professional associates, and so forth. As much as she loves you, it might her feel uncomfortable wearing a geeky ring at times, like at business meetings, or ten or twenty years in the future, when your/her tastes might be different. And no matter what she says beforehand, if you choose to go non-traditional here, you're always going to be at risk for the "you're actually giving me THIS for an ENGAGEMENT RING??!!" reaction from her. While it's tempting to get something that reflects the kind of person you are, it's very important to get something that reflects her tastes and the kind of person she is. A geeky ring might make a good Christmas or birthday present, but with the engagement ring, prefer the standard to the offbeat and eccentric.