1. I like rap music (though not all rap is good to the ears), and I find Dobondobondo no theme and Cherry Jam good to my ears.
2. Mami and Tomomi definitely have the chemistry. Their funny antics and spontaneity are great!
3. I love the lyrics... Though Koi no Hajimari wa Diet also has good lyrics, I just like the feel of the lyrics of Dobondobondo no theme and Cherry Jam more.
Koi no Hajimari wa Diet is a good song and it has Rina singing, but I'm just not really into electro-pop.
But then, at the end of the day, I still love them all.