For English ales (my most usual homebrew), I use regular pint glasses. For light lagers I use a Pilsner glass. For Belgians and big brews with lots of esters or spice I use a stemmed large round wine glass. For bruisers like Barley Wine I use a snifter.
SWMBO and I have a ton of Duvel tulips and pint glasses and both styles get lots of use. Someone gave us a pretty spectacular pair of Waterford pilsner glasses as a wedding gift. I need to brew something worthy of using those.
Who is this Rorschach guy? And why did he paint so many pictures of my parents fighting?
I use a stout glass for most things but I break out the tulip glass for sipping beers. I've also been known to use my German beer stein for German beer and my flask mug for beers that I don't consider anything special.
The only thing more asinine than stupid rules is the enforcement of rules simply because they are the rules.