Just reading the post with interest!
I learned to fly in UK and never logged a flight plan in reality. I did learn how to do it during my ATPL studies (and PPL if I remember correctly!), but never done it in real life!
Now live in OZ, different ball game! Flight plan for every flight. Would never dream of going outback without one, and makes life a lot easier entering into areas like Brisbane International. Always get codes assigned and clearance with no problems. If I ever come back to UK, will probably put one in for every Nav ex, just seems to make life a lot easier for all parties (only takes 5 mins to fill out).
I know its different out here, but if you can let as many people know what and when you are doing it it seems to make sense!I reckon all PPL's should be made to do them as part of the training as they are a pretty important part of the big picture!
CB