My editor has been opened for 2-3 weeks now so I just keep piling the files from all the different projects. I prefer typing 'C-x b [strat]' to opening '~/dev/projects/something_else/lib/strategy.rb' but it might just be the way I'm used to working.
But I agree with you, I hate quitting vim, it seems like I lose my place much easier when I no longer have those files open.