I go for "Interstellar Overdrive". That's just a fun instrumental to listen to. And while I like "Astronomy Domine", I much prefer the Ummagumma and PULSE versions...faster, louder, and generally even more fun than the original. It's a comparison of good to better, so I'm not bashing the original AD.

And I do like "Bike", and would vote it my favourite Syd Barrett composition. But it doesn't beat "Interstellar Overdrive".

__________________
"And with these words I can see
Clear through the clouds that covered me
Just give it time then speak my name
Now we can hear ourselves again..."

WrightSatellite #1