Aaaah I love Amnesia to death >w< I've watched various people play through it at least ten times, and played it another five or so. ^^; The only parts that still freak me out a bit are the second prison part, the sewers, and the choir >.< Ugh. Justine on the other hand...I've watched a couple of people play through it about five times and watched my sister play it once. The only part that really freaks me out is Malo, even though I absolutely adore him, as strange as that may be. *shivers*
In fact, me and my sister are going to cosplay Daniel and Justine this year, so be on the lookout on day one if you want pictures~
On the subject of YouTubers, I really don't have a favorite. In no particular order, I've watched JohnnyKnodoff (the first one I watched play Amnesia, and my first LPer altogether), PewDiePie, CinnamonToastKen, Tobuscus, TheRadBrad, ChaoticMonki, HarshlyCritical, and maybe like one other person play Amnesia? (Full YouTube names in case you guys don't know them =w=;;; )
I seriously can't wait for Machine for Pigs, even though that'll probably scare me really bad, ehehehe. I may or may not watch a playthrough or five of it first, though, so I know what's coming.