Woah...I really need to get my NG-Percentage higher as well. I really wanted to read what I requested there first but then something came along I couldn't resists requesting (in hindsight I do wonder why I really wanted that English translation of the Grimm's Fairy Tales but...ehm...it seemed like a good idea at the time)...and I somehow ended up with one I didn't even request as I follow them on Twitter and they often tweet links to their new acquisitions. I checked one of them out and it turned out that if you used the link they tweeted you got auto-requested o_O. Oh well it's not my usual genre of choice (a romance set in WWI) but it doesn't sound too bad.
I also really try not to request any books, but sometimes I still see a book that looks like it's going to be great (and that of course, isn't going to help my percentage). I didn't know you get auto-approved via twitter... Good luck!