I've never really understood the appeal of lichdom. I know, I know, immortal and all that jazz. But even if you were a human fantasy character obsessed with living forever, there are so many better ways to gain long, or eternal life. And then there's the whole cosmology bit. Even your lowly commoner can end up somewhere reasonably awesome for eternity if they are sufficiently devout. That always seemed like a better choice to me than giving up so much to hang out on the material plane forever. Or if you really want to hang out here on the prime material, figure something else out. Endless reincarnation loop if you must.