The best radio is when the whole Radio 1 Family comes together, I think! It's why I love shows when all of the DJs come on and get a bit of freedom. Non-Innuendo Bingo with Greg James during the LOLathon was one of my favourite bits of radio ever (Chris Sawyer producing again), and I even enjoyed Fearne Cotton's last show, even though I didn't particularly gravitate towards her show normally (except the Versus segments with Zane Lowe).
It's why I want Real Or No Real back! (Scott, Chris and Greg laughing about Bruce Forsyth being older than cubed ice , etc.)