I own both a throttle-operated (eZee Cadence) and pure pedelec bike (Pro Connect) and have ended up preferring the latter. I almost always pedalled the eZee bikes anyway, despite the pure power option, but also had to keep the throttle open at all times. I was effectively thinking for the bike, something the Pro Connect's Panasonic system does for me. It's also a lighter, more efficient, much, much faster bike that I know will get me all the way into central London and back, something that is impossible on the Cadence, despite all those extra Watt hours on hand.
At first I thought it was what electric bikes were all about, whizzing along under throttle control, no pedalling necessary. But it gets to your wrist after a while and you can't indicate left without laying off the power. Plus the bike ends up being a lattice of work of wires - from battery to controller, from controller to motor, from throttle to controller. Too many points of failure.
Pedalling helped take the strain off the battery and as a 30ish bloke, it was hard NOT to pedal, what with all my youthful energy and enthusiasm. So there I was, with a true ebike, pedalling almost all the time. The only time I stopped pedalling would be to avoid hitting the kerb when cycling down the gap between bendy bus and pavement.
Unless I'm on the Zero X, I'm happy to pedal and to have my pedalling boosted by the motor. But the Cadence is still a good bike to tear around rougher tracks on, which is why I've ended up owning one.