I would hate to start over, I would never want to revisit my previous lives, the karma expense is a nightmare to do something like that. I would prefer the awful job of land wight (Landvættir) for a thousand years than to have a redo for a human life and this has me shudder even if the +karma is extremely high. Even if you remember your previous life it is mostly pointless and distracting not to mention lonely. Know how to carve rock only to see the types of rock are not familiar, know how to tan hide only to see so much red tape to get to the skinning part that it gives you a headache, don't even get me started on making medicine or construction of a house. Anyways the Earth is a wired and not simple place much too small in the grand multiverse.