I think I liked "Gamble" the best, although I like the original version better. I don't hate this version and I think it was put together really nicely for this style, but I love "Gamble" as a rock song. (I'm waiting for the movie version to come out. T_T) Like some people said, I don't like the 'squeakiness' at the end of her words (just one or two would've been nice) but I really love the 'catty scream' (dunno how to describe that) she did at the end of the last chorus. It was amazing watching her sing that part in the
Bokura no Ongaku 3 show. *_*
Other songs that I liked were "Papaya Mango," "Meisai," and "Poltergeist." I love this more authentic jazzy version of "Meisai," especially the trumpet part between the verses. (I loved it when she did that side-kick thingy during the performances. XD) "Poltergeist" is the only song I've heard with words and still sounds like classical music, if that makes sense. I think it'd be a great song to waltz to. *_* And what can I say, I really like the "Papaya Mango" cover.
"Oiran" was interesting, but I can't tell if I liked it or not; all I know is that I liked it as much as "Hatsukoi Shoujo." The other English songs were all okay and entertaining. But yeah, I think overall I didn't have any real favorites in this album, like Justriiingo (except sort of "Gamble.")
It bothers me that the track list was soo close to being symmetrical. >_< I bet Ringo was greatly bothered by it, too.