"For A Pessimist" def. has to be on there. There are so many catchy motifs on that song.
"Brighter" is what got me hooked the first time I heard it so I guess if it worked on me...lol
"My Heart" adds a nice change of tempo.
I also think that "Conspiracy" has a strong hook.
But to lean more towards RIOT! I think that "Hallelujah" stuck out to me the first few plays.