I swore I'd never drive a minivan but here I am doing so and actually enjoying it. It is versatile and very easy for the kids to get into and out of by themselves. It gets good gas mileage even in the cold winter months. I have never gotten below 22 mpg on a tank of gas. I love the fact that it is getting more popular and that when I first got it, people were asking me what it was. I love all the spaces to hide things in. I've been accused of having everything but a toilet and sink in it but you won't see any of it. If you live in a really snowy/icy climate you will want to get snow tires. Stock tires perform as expected on the snow but are next to useless on ice.
Versatility, gas mileage and all the little spaces to hide things.
Paint (it stains and scratches very easily), more peppy engine, improve the reception on the radio, tinted rear windows, AWD option, Xenons option, remote opening of sliding doors (although the existing doors are easy to open) option.