very good responses from everyone thanks, special thanks to TheOddOne and BEagle for comprehensive posts.
how to summarise all that, I will try
1) QNH all the time is becoming more standard
2) QFE has its uses for circuits and arrivals sometimes
3) QFE for departures is easier for students but can lead to level busts elsewhere
4) Flying QFE departures or circuits when you have QNH defined controlled airspace nearby is maybe not so good.
hmmn, my personal opinion is for a balance of logic and ease of use is:
1)IFR - QNH all the time
2)VFR - QNH for departure
QFE for arrivals
QNH or QFE for circuits
once again thanks to all
regards
CF