float someone's boat
US /floʊt ˈsʌm.wʌnz boʊt/
UK /floʊt ˈsʌm.wʌnz boʊt/

1.
気に入る, 好きである, 満足させる
to please or satisfy someone; to be what someone likes or wants
:
•
I know that kind of music doesn't really float your boat, but I love it.
そういう音楽はあまり好きじゃないだろうけど、私は大好きだよ。
•
Whatever floats your boat, I guess.
好きなようにすればいいんじゃないかな。