Well, the thing is that we ARE a part of nature, i.e. nature acts through us, not from us. So a personal God would have feelings-- and would need to have something to have feelings ABOUT. It would need a will-- and would need some reason to choose one action over another.
In other words, a personal God fails to infinite regress pretty much right away.
In other words, a personal God fails to infinite regress pretty much right away.