I love fast software. That is, software speedy both in function and interface. Software with minimal to no lag between wanting to activate or manipulate something and the thing happening. Lightness.
Sometimes, especially in a document with a lot of tracked changes, MS Word will grind to a halt: I’ve typed entire sentences before a single character showed up. Network fileshares lock up on me trying to load a list of folders. I’m actually quite fond of Jama, so when they asked for feedback, the main thing I could think of was to make the user interface even more snappy.
Oh to have been a computer user in the glory days of 1983.