Apologies if we've had this thread before - I've been listening to him lots since the excellent Five Years documentary on BBC4.
Hard to narrow down of course but I'd go with:
Kooks - The melody and warmth of this song is quite breathtaking I reckon, absolutely adore the '... I'm not much cop at punching others people's Dads..' lyric
Modern Love - About the only thing that appeals to me about getting married would be the prospect of having this as the first dance - joyous