I’ve talked to many people about this and the answer is always interesting. Basically as with everything else in life, it depends on the person. I personally own traditional glasses as well as the stemless Riedels. When I’m sitting at my desk working and enjoying a glass, I prefer the Riedels because they’re less likely to tip over than a traditional glass. However the argument can be made that stemless glasses are bad because your hand grips the glass itself which in turn heats up the wine to an unsavory temperature.
In my opinion? go with what works for you. If you like the stemless, use it. If I know I’ll be holding a glass for a while, I’d prefer the stemmed for the reason mentioned above.
Here’s an article about this very subject.
If you want to make a BIG entrance to a part, show up with a box of wine and a stemless glass. You’ll be all the rage. 🙂