What's the coolest GTA Mission?

[Agent]

For some reason I always loved the one in Vice City where you had to execute the guy on the Golf Course.
You're supposed to do it without weapons but you can enter the golf course without losing weapons.

The thing I love about Vice City is the storyline hooked me in- after one good mission I couldn't wait to do the next one.

Most of my favourite missions would be in Vice City, but from SA I'd have to say the whole Heist set.

You stole my words ..
In SA there were some nice missions .. I want to see the missions in IV .