Which TI calculator do you use?

My school requires me to use the ti-84 plus as well. I had never used a graphing calculator, so this thing sparked my curiosity indeed. It has a big screen...and loads of games! I downloaded Phoenix and Mario. What about you? I don't play games during lessons, though they're good time-killers. :)

I use a TI-89 and I love it. It can do so much symbolic math that it makes it perfect of an engineering student such as myself. That is of course when we are allowed to use calculators on exams. But it is also good for checking homework and such.