I agree with robin... I have a personal logbook with stamps of fields I've flown to (can't put that in a spread sheet), names of passengers that went with me, etc. I additionally put my flights in an excel spreadsheet... aids the mathematics heehee. So, my paper log book is with me on all flights, the spread sheet is kept at home, with occasional back ups.
The personal log book is something you look back on when you stop flying... a spread sheet is just not so nostalgic
If I read our JAR-FCL regs right, a personal log book is necessary.. only in commercial operations can exceptions be made. Have to look it up again...
We should do a poll....
I vote for both: personal log book with spread sheet as back up
Westy