Driving the i3 is... Well, it's kind of like looking at the i3. You might like it, you might hate it. I kind of liked it, but it's certainly not the typical BMW experience. At its best, a BMW makes you feel connected to the car while also being relaxed and comfortable.
The i3 does provide that nice sense of control but, with a body that tall, the suspension has to be firm. The ride isn't exactly rough or unpleasant but it is bouncy in a happy, buoyant sort of way. It's fun at first, but it can get kind of irritating after a while.
One other thing that takes a bit of getting used to: You barely have to use the brakes. As you lift up on the accelerator pedal, the electric motor stays connected to the wheels, slowing the car sharply as the motor is cranked backwards. This also generates electricity for the batteries.
Once you get over the "single pedal" weirdness, it makes much more sense than going between the gas and the brake with your right foot, especially in city traffic.
Mind you, there is a brake pedal for when you need to stop completely.