We generally always try to stay in a preferred, but it is a roll of the dice sometimes if they give me a site long enough for my motorhome & tow vehicle. Sometimes, the rear of my camper is against the bushes and my tires are on the sand. I have, at times, gone back up to reception and asked for a different site that will fit better. I will give them the site numbers of a couple that will work better and they usually will give me one, if possible. But sometimes they are full & you have to take what you get. I like the preferred because I like to walk down to the beach early morning, or take a break on the porch of TE.
What I do like about the premium sites is that they are big enough to accomodate me with no problem, but, I probably can't use my tent for any extra company.
The picture below is my rig a premium site in the 900 loop almost directly across from the comfort station.