Just going off of the albums and EPs that I own...
Parachutes: Spies and Everything's Not Lost
AROBTTH: Amsterdam and AROBTTH
X&Y: Swallowed in the Sea and Til Kingdom Come
Viva la Vida or Death and All His Friends: Lost! and Death and All His Friends (...and Cemeteries of London and Violet Hill and 42 and Yes and basically every song on the album)
Prospekts March: Life in Technicolor ii and Prospekts March
Mylo Xyloto: Charlie Brown and Every Teardrop is a Waterfall
Ghost Stories: Midnight and O
Since I'm 15, my first real encounter was when I was really little. When I was a toddler, I sat on my dad's lap and we listened to AROBTTH. And then later in my life, my mom was always listening to Viva and my parents went to their concert in 2010. That was the start of my obsession...