lol honestly me neither D: but for the guys , they have a good mix of serious , poetic deep , random , funny , silly songs in which the random/funny/silly ones are done by DAIGO xD
*points to LOVE FIGHTER , IN THE SKY , BUZZER BEATER & etc
While the extremely poetic deep ones , you can rely on AKIHIDE to do that
*points to Nanzenkai ... Nanmenkai ... , Hoshi ni Negai wo , Aitakute , Sekai wa Odoru , Aitakute , Smile in Tears , Orion , Snow Rose & etc
so you basically have something for everyone at the end of the day to enjoy
I didn't list SHINPEI because he leans towards composing more than lyrics writing & I haven't seen him providing lyrics for a song (yet)