Putting an electric motor on my bike has almost turned it in to my dream bike. (of course, I'm always dreaming about improvements-- I'd love to replace it with a weatherproof velomobile and get a more powerful motor some day... and add more "plug in and go" convenience).
Things I like: the tires are flat-resistant due to their sheer tread thickness. The no-suspension MTB frame and rims are durable. The storage compartment is waterproof, making the bike more practical in bad weather. The bike's pretty light for an electric bike due to the lithium battery and relatively compact motor. The narrow curved handlebars help me avoid wrist and back discomfort. The seat has had its padding torn off and is now much more comfy.
It's ugly as sin, hopefully won't get stolen.