The biggest way I play with LEGO is by building with it. So yeah, I play with my sets. I don't leave sets together to display, for the most part. I build them, then admire them for a short time, try out any play features, swoosh a bit if applicable, then disassemble it and put it away until I choose to build it again. In the meantime I will raid sets as necessary to build something else, enjoy that for a short time, then try to put the pieces back in the sets they came from. Most of my sets are disassembled at any given time, and all have been assembled many, many times over the years, by myself, and by a succession of children.