I have no idea what you're talking about there. On the nuv series favorites=waypoints. If you put waypoints into a .gpx file and place that file in the GPX folder on the device, when it restarts all your waypoints will appear under Where To > Favorites. You could also use either Mapsource or Basecamp to send waypoints to the 3790 (which would have the same result - it will place a .gpx file on the device which will be imported).
I also can't agree with you that the Nuvi 3790 is less "user friendly". I think the Nuvi's are overly user-friendly, which I would define as meaning an average person with little or no GPS experience can pick one up and use it.
Now, I stopped using my 3790 after I got my Montana and am not likely to go back. However, it is because of the more powerful features on the Montana (which are LESS user-friendly IMO) and the style in which the map is displayed.
The one thing that still does impress me on the 3790 is the way it handles 3d however. The map is rendered in true 3d space and not "faux 3d" like other Garmin devices. I had a lot of fun making maps that take advantage of this myself and will probably revisit it someday.
