Post a video to represent each of the subject matters below.
Post the first song that comes to your mind to best represent the subject.
Send on to a selection of your friends including me.
Here's my list with choices beneath:

A TUNE THAT MAKES YOU HAPPY/SMILE/LAUGH
Stereolab - Stomach Worm
Here's a listen video -
... and here's a (live) watch one.

A TUNE THAT YOU HATE
Eric Clapton - Wonderful Tonight
I hate this with all the hate that its possible to have - I scare myself just how much I hate it - the opening guitar line and those mawkish lyrics - it is a crime... I'm only posting a link because it's in the rules... don't click!

A TUNE THAT YOU LOVE
Today it will be Galaxie 500 - Don't Let Our Youth Go To Waste - on other days it will be other Galaxie 500 songs
No idea what it has to do with Matt Dillon and Rumble Fish but it was the only video I could find


A TUNE YOU'D WANT PLAYED AT YOUR FUNERAL

Fairport Convention - Who Knows Where the Time Goes
Could have chosen any of a dozen Sandy songs...

A TUNE THAT IS YOUR GUILTY PLEASURE
I don't think I have guilty pleasures - there is no music I love that I feel guilty for loving and I'm utterly convinced that it is all unquestionably cool but just to put something in here...

Slade - Far, Far Away

A TUNE FROM A FAVOURITE FILM OR TV SHOW
Jacky - White Horses
Loved this for ever so it was just an extra special treat that Dean & Britta covered it... twice

A TUNE THAT YOU THINK NO ONE ELSE WILL KNOW
Schrasj - Tower
Actually I've no idea if anyone else knows this or not - but it's awesome. I was sent a 7" of this in the early days of the Galaxie 500 mailing list - I tragically can't even remember who sent it... if it was you I am forever in your debt.
Here's a live video (which I'd never seen before)
And you can listen to (or download) both sides of the single over here - do that!