It is known not to affect libido, my case of lacking one has nothing to do with Lamictal.
I think if a person has good health, but needs a mood stabilizer, there may be little problems, but then depending on the med and if it is recorded as causing problems, stuff like that is documented while meds are going through clinical trials,etc.
Everyone is different, and have different priorites, mine would be to take the med(s) and be stable rather than unstable, but that's just me.
I wish you luck with whatever you and your pdoc decide works best for you.