Apart from being superbly convenient because you can use it for so many things other than just shipping your bikes(s) around, running a van for just a few months has got me to the point where I am thinking of getting rid of my car (as well as selling the van I bought) so I can buy a better van.
Insurance is lower, mileage is about the same, but I get let out of junctions so much more often! It's nice to be raised up above the rest of the traffic, too. It's great to dump muddy clothing/boots/bikes in the back and just not have to worry about it.
There are 3 seats (well, 2 1/2 really) and the van I have (Fiat Scudo) drives like a car. The only downer is that it's not the easiest thing to see out of the back of (due to having a bulkhead fitted) so you have to be very steady when reversing.
OK, so it gets a few comments from the neighbours, mates take the mickey for a while (until they want to use your van to shift something) and it's arguably a step down if you're concerned about status, but if I'm honest, it suits my lifestyle, so I am now officially happy to become a full time vannist.