Ohshit those squid men are scary! D:
I always play on peaceful since the first time I played, I made a hole in the ground, build a door and some tools and started mining down- and just my luck, my hole in a wall happens to be just on/above an underground pool of water... O___O So I was freaking out a bit because I was near to falling into it on my way down a couple of steps I made but it was ok, and I began mining out some space and was about to mine my way down into the ground when a skeleton starts shooting at me!

I thought "wait? I didn't leave that door open, I couldn't even figure out how to open it?" so I turn around to look where it's come from and GAHHHHH it had spawned in the water pool bit in the shadows!

It really scared me as it was right there as I turned... I paused it and didn't know what to do (not to mention feeling like a total wuss for not being able to stand one little skeleton) and remembered about peaceful mode.... it hasn't come off since!
I haven't been playing minecraft at all recently...
Though, a little while ago, bon made me play a new world together and I did end up building a pretty funky house- had a skylight and a big window at the front... also a row of pumpkins!~