I'll second the Sienna. We bought ours a couple years ago. It's a 2013 that we bought in 2015. It had 30,000 miles on it when we bought it. It is fully loaded (way more loaded than I ever would have looked for), but we love it.
When we looked for a new van we were between the Odyssey and the Sienna because of the ability to be 8 passenger since we occasionally carry that many if one of the kid's friends comes over, or the older girls are rising with us. The additional seat can be installed between the middle captain's chairs. The problem with the Odyssey was that you have to stow that jump seat outside of the van or loose in the back, where the Sienna mounts to the driver's side rear wall.
My wife calls it the "Swiss Army Van" since the seating is so configurable. We can put the jump seat in and fold the rear seats completely flat and get our family of 5 and an entire load of stuff from Costco in the back. With the rear seats folded down and the jump seat in place, it's about like having a short bed pickup truck with a camper shell in terms of space.
Rear A/C and power sliding doors were the only "must have's" when we looked, but we ended up with heated leather seats, power sunroof, traction control and a very nice stereo in the XLE package. Get's decent gas mileage for an 8 passenger van. 6 speed transmission and a healthy v6 has plenty of power.
I hate our Sienna, but my reasons are picky, and would probably apply to any minivan.
1. The steering wheel is offset to the right by about 2 inches. If you are fat (me), muscular (me), or short (me) it puts an awkward stress and tension on your left shoulder that becomes very uncomfortable after about 2 minutes of left hand driving. Due to years of driving manuals, I generally only drive with my right hand. Plus I actually use my turn signals, so I need my left hand for that.
2. You cannot push the button to open the power sliding doors unless the vehicle is in park. Sounds sensible, until you are trying to drop your wife off in front of the grocery store and you push the button and cuss at it, then put it in park, then push the stupid button again. Repeat when she comes back out.
3. The vehicle cannot be locked/unlocked from the keyfob when it is parked and running. Since it is pushbutton start, you can take the fob with you, but you might as well give it to the kids to play with. So if the mother in law and kids are in the back, and you want to go in a store and leave them in the car, someone will have to climb in the front and lock the doors (cannot lock them with door open either). Also, when you return, the fob will not unlock, so they will have to climb up front and unlock again.
4. With all that safety, you'd think you would have to have the key in the vehicle to drive off, but you'd be wrong. Once it is running, hop in, drive away. No proximity key required.
5. Remote start requires you to cut the vehicle off, unlock it, and then restart the vehicle. Dumb.
6. Throttle calibration is bad. Slight throttle results in no acceleration. Slightly more throttle (1/4) results in almost the same acceleration as full throttle.
7. Torque converter does not hold on a hill and does not "push", so as soon as you let off the brakes on a hill, it starts rolling backwards. Most Toyotas I have driven are like this.
With that said, there are a lot of things I like about the Sienna.
1. 3rd row seats fold flat, even in the AWD model.
2. 3.5 v6 actually has great power. The transmission is not great, but it is generally good.
3. Tons of space. Even the 3rd row is ok for a normal sized adult.
4. Great headlights. My F250 has about a half acre of surface area for the headlights, and they are crap. The Sienna has these tiny little headlights, but they work great.
5. Uncrowded engine compartment. It's not roomy, but there's room to work on stuff at least.
6. The only All wheel drive minivan. That was a must for us. So it made it easy to narrow down the options.