Lamictal is the best thing to happen to me. Just be careful, as you may know, if you get a rash you need to stop taking it asap.
I don't feel a personality difference from taking Lamictal - actually I don't feel it at all. I think of Lamictal like a safety net. When my mood starts to drop, the med keeps me from falling deep in the rabbit hole. I usually feel like a zombie on those days but it's not because of the meds - it's my sad mood being caught by the net. It feels like being "in limbo" and that can make me feel like bit of a zombie.
Good luck on the meds