Here in Jeddah, the boats I go on are 48 footers, and have decent space for storing your gear. However, some people bring their gear in giant bags, which are great for the beach, but not a boat. The other problem is that even if everyone brought compact gear bags, there can be so many divers that some people are forced to put their bag here or there. There is always space for 21 divers to sit side by side, but not necessarily for 21 people's gear. Only so many people's gear can fit under the bench. That's why I try to get to the boat earlier than others, so I can set my little station in my preferred corner. I use a soft gear bag, which collapses nicely once I set my gear up before departure. Also, I like to use HP tanks, as they are DIN, and almost everyone else uses the regular Al tanks. Otherwise, most people just take the first tank they see, without regard for who is using that particular area. That's one of MY pet peeves, as well as excess gear baggage.