Personally I stay in survival for everything. Creative mode sounds cool, but actually foraging for all your mats, while fending off the nightime terrors really adds to the survival aspect. Plus, the point of building a nice home is so you can hide from the baddies! Well, that's what I think anyway
From reading about tribulations people are having with their seeds, I am really hoping mine is a decent one. I have still barely explored outside of my small radius I was going through getting my house building stuff. I'd hate to have to rebuild my house again...but it shouldn't be near as bad the second time around I hope..
On map size, I saw an image where someone had several maps in frames on a wall. The map you start with, does that dover the entire world you are in? Or just a small section, to where you need several maps?