Why do people have such large trailers?

When we looked at the inside of trailers, we wanted a 33-35 ft bunkhouse, we wanted our own bedroom, the kids could have their own bedroom, etc. When we thought about the places we'd been with our 26' trailer and how we would fit a bigger one the places we like to go, we decided 29' was about our limit. We finally settled on the one we have because it has triple bunks, so nobody shares a bed and the dinette and couch are always available. We like the super slide because there is a ton of open area for moving around. Works great. Sometimes we still wish for the extra room and storage and privacy a longer trailer with a quad bunk room would offer, but the trade-offs were not worth it. We may go smaller once the kids move out, but that is a long way of as the youngest is 7.