Stations are really nice, but my WP25 is good enough for me. It cost almost as much as a cheap station, though.
Cordless irons are neat, but not overly useful. I think one would be handy for quick jobs when you don't want to wait, like if a wire came loose or something, but not any good for anything else. I'm talking about battery powered ones. Butane ones are cool but waaaay overkill for the kind of stuff we do. Probably great for robotics use, where you have to solder big huge wires, though.