These are my favorite songs by each Splatoon band from Splatoon 1 and 2

Calamari Inkantation (Traditional)

Tide Goes Out

Bomb Rush Blush (The Splatoon Final boss version)

Metalopod

Ink or Sink

(I really like Ikkan's vocals so of course these two are my tops)

Kracken Up 

Now or Never

Hooked 

Sucker punch

(I like both of their songs hoping to see these guys back in Splatoon 3)

Blitz It 

Wave Prizm 

Shelfie

Ebb & Flow

Fly Octo Fly

Nasty Majesty

Now Or Never (One of my favorites)

Acid Hues

Don't Slip

Now or Never (another fav)

Inkoming

Undertow

Rip Entry

#8 Regret

#9 Party

#13 Shade

#14 Crush

#19 Bless

Kinetosis 

Seasick

(sorry for all the blinkies they are all by Man Door Hand Hook Car Door's Splatoon Blinkies on Tumblr