I just bought a 2016 F150 Ecoboost with it fully loaded to the max tow package, tow mirrors, HD pacakge, and every option. I love it!! This is my first trailer and will be for awhile. The TV pulls it like a dream. We are out on a trip right now and just went thru the cascade mountain loop highway and it was a steep winding road with no problems. Gusty winds with NO sway or problems. Truck tows it perfectly. However other than maintenance costs and gas I sometime wish I had the 350 but the 150 had way more room in the back seat and looks so much better too. Both my teenage boys one being 6' and a 83lb black lab fit in the back with room to spare. A couple of trips I have had three boys and the dog in the back with no complaints from the kids. Anyways bigger is always better (that's what she said) but for what I'm pulling fully loaded with peeps and cargo I'm perfectly happy. I hit the CAT scales last week and I'm well under the 20% safety margin for towing.
FYI - I'm young so I already told the wife there will be a day when I will be driving home with F-450 and a massive Artic Fox slide in camper pulling a boat
but that day will be closer to retirement.
Happy camping and may the sunsets sets blow your mind and the stars shoot across the sky.