If I were to rate the OP and EP songs.
OP music
1,2,or 4 > 3
OP animation
4>2>1>3
EP music
2>1>3>4
EP animation
2>3>1>4
OP1 - DAYS (Flow)
OP2 - Shounen Heart (Home Made Kazoku)
OP3 - Taiyou no Mannaka he (Bivattchee)
OP4 - Sakura (Nilgilis)
ED1 - Himitsu Kichi (Kozue Takada)
ED2 - Fly Away (Izawa Asami)
ED3 - Tip Taps Tip (Halcali)
ED4 - Canvas (Coolon)