and each to their own ... Classic R&B is what works for me ... Marvin Gaye, Curtis Mayfield, Aretha etc.

I always liked flat eric. He's so cute.

Latin is the maaageek...
Always a delight to hear from places where most lives are probs less prosperous than mine, yet they are playful and upbeat.
If I wanted someone to feel my pain, trance is a much better fit - Room for Happiness, I Remember, Alone, Human Reactor, and most of the rest, really.
Country gives me gas (must be all the coal-rolling), and rock is just as whiny and narcissistic (looking at you, too, emo and grunge) as modern pop. Which includes R&B and hip hop, because Kanye & company is just more first-world, privileged-rich-boy problems. Thus why he and The Duhnald are such great friends.
When they're not pretending to be all "hard thug", that is.

I could listen to Hawaiian music all the day. The sounds of a Ukulele make me smile and bring me lots of happiness. A Uke for me is relaxing.

are what does it for me. Which seems odd, but the blues always makes me smile.

You could give?

not the op, but justice, french79, sebastian tellier, the blaze are all french groups.

French79 - just put a massive smile on my face and gave me this huge jolt of happy energy when I needed it.
Glad some of the posters here totally get it. I love all different kinds of music, and when I go too long without listening to something...when I come back and listen to a song I'm kind of shocked at what an effect it has on my mood and outlook on life.
Music therapy, mes amis.

@anynames
Probably won't make sense unless one is a former dj, or similarly musically afflicted.
I'll call out just three - two from EDM and one from Latin.

For depressing stuff - Reckless (Gareth Emery featuring Wayward Daughter)
For letting go - I Remember (Deadmau5 & Kaskade featuring Haley Gibby)
Particularly the lyrics.
For bouncy things - Con Calma (Daddy Yankee featuring Snow; there's a Katy Perry remix, too)