Thanks for the replies, yes I do ask for clearance before I taxi and at some airports I ask before start up. But it appears more often than not I'm told to standby, then asked if I'm ready to taxi and when I do then I'm given my clearance.
It's not me gettin tetchy, but ATC when I set down in the middle of the taxi way and ask for the clearance again!
As for employing a second pilot, 95% of police and air ambulance helo's are single pilot with not provision for a second, but we still fly IFR often at short notice.
I just want to spread the word that some of us still fly SPIFR, but if IFR there is little difference between us and the fixed wing world.