I plot reset for each new move-in, but I don't have any super specific spots where I want them to go. I just don't want them on paths/on flowers/etc. I actually prefer the way it looks when villager's houses aren't perfectly aligned or somewhat scattered. I personally find it really boring to see all 10 houses in a perfectly straight line, but that's just me.
100% same with me. I don't care where they go so long as it isn't somewhere stupid. Stay away from my trees or my flowers, and don't settle down directly in front of/behind a building, and I'm golden.
Putting everyone in a line is too... perfect. It just looks odd.