Most Helpful Guy
Thrash metal. Heavy metal, classic rock, hard rock, indie, older country (Waylon, Johnny cash, hank Williams jr. Don Williams. Marty Robbins) listened to a lot of metallica, megadeth zepplin doors and priest, those five started a train that ain't stopped.
Most Helpful Girl
Basically any type of Rock, Symphonic Metal, Heavy Metal, Industrial Metal, Black Metal, Indie, Classical, Jazz, Blues, Soul, Funk, Punk, Disco, Opera, Dubstep (especially Metal/Classical), Country, Pop, Electro, The Lion King songs, cartoon songs like Teen Titans, Braceface, SpongeBob Square pants, Family Guy, American Dad, The Cleveland show, Bob's Burgers and many others, Timmy Timato's song Zazaza, Gospel, Accapella, Jon Lajoie songs, Trentemøller's music, Lisa Gerrard's anything etc.. Also I love to hum Doctor Who's theme song/I'm the doctor song/Songs of captivity and freedom and Harry Potter's theme song.
I'm sure there is no more.