Our first stay at a DVC resort was in a studio. Now we use only one bedroom units for ourselves. We also used a two bedroom at Vero when our daughters wanted to join us for beach time.
No surprise... I'm with the majority, staying at a Studio, 1Br, and 2br.
Now with a DS13 and DS10, we're pretty much sticking with the 2BR... we need our "space". This is exactly why we bought into DVC... It provides affordable spacious accommodations, the luxury we want, and still be able to vacation regularly.