Looking for insight on Princess 62 and 65

I think the question here is if you want a larger flybridge and saloon for the F62.
The F62 is really a stretched 62 footer, and was an evolution Princess 60 mk.2 from 2011-16.

I think the S65 has a lot going for her, four cabins, double inside and outside dinette, and a flybridge which for a sport bridge is very spacious.
Most important I think the lines are still very actual.
A new S65 is coming replacing the S66, which is basically still nearly the same boat with some really minor stylistic changes.
So even though the S65 is an older boat she has aged and I would think will age much better.

Probably if you plan to staying onboard/liveaboard in the colder months (probably not much of these in Florida) the F62 might be better suited for this.

As for riding I rode the V62 2008-(S)12-15 and that boat really rode nice and comfortable. The one I tested was a 2009 with Man 1200hp and I really liked her, with a very calm and controlled composure.

Go with a 66' Sunseeker Manhattan. Much better sea boat, and better build quality. I ran a 62' Princess Flybridge back from the Panama Canal to Ft. Laud and a few others, it is not that great of a seaboat and the build quality leaves little to be desired....pounds and rolls a good bit.......Cabin doors coming unlatched and slamming open on their own in very moderate seas because the interior walls are moving for starters.....seakeeper very undersized.......I ran the 66' manhattan all over the Bahamas and to Guatamala and back from Fort Lauderdale. I've had both in nasty seas.

If you're coming out of a 61' Viking, you'll be very disappointed in the ride of a Princess.

True statement, also because length to length a sportfisher is bigger, wider, and heavier yacht.

I do not know if this still holds today but in Summer 2016 I was a captain on a Cayman Yachts 58 WA-HT, and a trip in Sicily resulted in rough seas with wave 6 to 9 foot waves upwind and to the nose.
I drove at about seventeen knots with the Cayman, and no problem beside that some after I moored in the marina , two Princess's followed a 78 and 72 which come from a following sea, and both had there head liner all fallen and had to waste a day fixing things up. The 78 MY was in a worse shape to the 72, which is apparently something common with this series.

Tell them to put their foot in the engine room vent and step right over. It isn't rocket science. There is a nice ledge at the bottom of the ER vent you can put your entire foot on. The 60' Hatteras is no different. Or install a tide ride or removable step, or side doors can be ordered now from several of the popular Euro builders.

Yes.

The 60' Hatteras MY is the same way. You can clearly see the bow rail is there to grab onto and the cleat. Or buy a set of Marquipt stairs just like other yachts for boarding from a fixed dock. Or order the boat with side doors. I don't see that style as anything different than any other MY manufacturer in that size range.

Please show me a modern motoryacht under 70' that does have a good design

Sunseekers have doors and they're available as an option on Princess yachts also. Zoom in and look at the bow-rail all of the way aft, it's mounted on a side door.
Sunseeker | Sport Yacht | Welcome to the Sunseeker 65 Sport Yacht

The poster is looking at the S65, which is a sport bridge model, like the 65 Sport Yacht, or the older 68 Sport Yacht 2013-20.
Previous Ss68SY was actually equipped with shafts, for twin 1600hp usually by Mans, which probably fit more in the budget of the Princess 62 or S65.

Interesting not many builders ventured into sport bridges under 21/22 meters. Princess, Sunseeker, and Riva with the 66 Ribelle where the exception.
Riva also had the SportRiva 56 produced from 2007 to 12.
Pershing did the 74 for some time, but never went under this size, Azimut had the 72S, then the S7 all above seventy feet, and in 2021 introduced the S6 with sport bridge at about sixty feet.