Well I used to hate reading 1D fics, but I'm warming to them now, and this was one of the better ones I've been given to read. It's just too cute! I really like the layout, it's pretty and still readable. I think the whole idea of being pen pals is original, and I thought it was a great plot idea. Good luck with this!
Cute!!! ^^ I loved this, it's actually really nice. When Comment Swap gave me this I thought 'Here we go, another 1D fan-fic' , but this was actually good! I'm not really much of a One Direction fan, but out of the boys, Niall is my favorite (; Also, I love your layout for the story, it's very pretty *^* and the little gif at the top made me laugh a little. Good job and keep writing! :3
There's something I noticed, a wrong word. Why waist your time in the looney bin when you can have any dirty slag you want? I believe you want "waste" not "waist" as the latter is an anatomical body part :P
Other than that, this is really amazing! I love the idea that they're pen pals. I think it's a brilliant and definitely original idea :)