I don't necessarily object to a system using a lot of memory if it offers me something in exchange. While I don't use it full-time, I respect the fact that OpenSolaris uses a huge amount of RAM because ZFS has pretty aggressive caching. I don't really need that, so I stick with a lighter system.
What are the advantages of using whatever your resource-hungry system is? What does it offer me that my SliTaz and dwm desktop doesn't?
I desire absolute control over my system. I like the fact that I can explain what every single process on my system does, something I couldn't do easily with a system such as Ubuntu or Vista.