Chris/Kem and Luke M/T are my favourites. Their friendships were great to watch, very real and genuine and both bromances bounced off each other. I love how Luke T has been there for Luke M. Chris and Kem literally had the entire nation gripped. They were LI3 in a nutshell. It's great that they're still friends.
The other two were just fake, false and way too forced. I cringed so many times at their pathetic attempts to replicate Chris and Kem.
Btw Big Evil, you left out Wes and Josh.