I'm 17 and I guess a little obsessed with 5 Seconds of Summer. My favorite is Luke who is an angel :)
I've discovered music recently and I love my taste now. After finding 5SOS, I found the 1975, which are now my second favorites. I saw them at a puny little venue. Currently, I have tickets to see 5SOS(9/5/15). So I'm also a fan of The Vamps and All Time Low and Fall Out Boy and Blink 182 and All American Rejects and The Cab. 
To sum it all up, nothing compares to the 5SOS boys. So yeah.