Seeing as I don't know the writing styles of a lot of the gang this time, I'm gonna struggle even more than usual with this!
1. US spelling of 'color' says to me it's not DEO. I'm going to go with Johnnyjet.
2. Jastius?
3. Mouse
4. springs or... someone else
5. This one has missing commas, so I know who it can't be. I'll say Darkchrome because I don't know your writing at all.
6. I think this one could be springs too. I don't think it's one of the Americans because of the use of 'that.' Maybe Kerry.
7. Chrispy
8. 'Trash can' and 'garbage' means this has to be an American, right? I don't think the Aussies say trash can. Or do they? Is this DEO? or Glisterspeck? Or, erm...Remedy?
9. ratsy. Mostly because the character's called Nathan, although that's weird. Or, Quellist. Or, Robert.
10. Washbasin instead of sink. Hmmm. Erm. Ummm. DEO. Or, CC.
11. Chrispy
12. Single quotes. Probably not an American or Canadian. Kerry. Or Robert.
13. Colour. Colour. Spelled properly. Hmmmmmm.... DEO or springs. (Because I haven't guessed those two enough, obvs.)
14. I was going to say Victoria until I got to 'harbour' with a u. Fairies makes me think springs! Curses! Kerry?
15. I don't think this is Victoria either. Who would use 'alright' instead of 'all right'? Argh! Remedy?
Ok, I suck. I think I've got none. I've not even guessed which one's Victoria's and I thought I could spot hers! And springs! Unless you're all being tricksy with your spellings and whatnot.