I'll chime in with my $0.02 as well.
I find the acceleration to be great (not sports car, but compared to a similar size/style of vehicle) and everything very smooth. I've gotten used to the over-boosted steering, and my wife has actually grown to really like that (I'd prefer a little less boost, but it's OK).
Suspension is about what I would expect on this style/size as well, I don't have any complaints about that. Again, it's not a sports car, but I'm not expecting it to be. I've driven other similar mainstream vehicles that had far worse suspension, either too rough of a ride or too "floaty". The Leaf's is a good compromise between handling and comfort, IMO.
Responsiveness is excellent as well (no delay when punching the accelerator). Smooth, direct, fun.
The tires SUCK. Seem to have a lot of body roll, and slippery when the roads are wet (not a good thing here in Seattle). Also, have you ever had the window open and listen to the tire sound when cornering? I'm not sure if it's just because it's so bloody quiet that you're hearing more of the tire sound or not, but it's not an encouraging sound. I understand that low rolling resistance tires match the overall concept of the vehicle, but it's the one area of the car that doesn't meet with expectations.
I'm leasing the car, and I'm seriously considering getting new tires for it. So what if I lose a mile or two of range? I'd rather have more confidence in the handling/stopping ability.