No way am I going to manage to avoid killing one of those mosquitoes for ten years, I'd surely do it by accident. So I think I'll take the problem-solver one, and in addition to the usual make-the-world-better-and-me-rich stuff I'll have them work on solutions to all of the annoyances they cause me - artificial mosquito food, repellent to keep them focused on the artificial food instead of me, techniques to reduce the annoyance caused by their whine, etc. Eventually I'll get my brain transplanted into an invulnerable robot body or something and then the mosquitoes are welcome to hang around and do whatever they like.