Absolute biggest hate at restaurants: waiting too long for the bill. I have eaten. I have enjoyed it. I now want to go somewhere else for a drink, or catch my train home, or whatever. Don't make me wait.
I remember when Ichiban switched to iPads and optimistically fired about 30% of their wait staff, presumably after drinking the kool aid. The service was horrendous until they hired them back.
It's in our office block (aperia, well north of the cdb). Not sure what it's called, but makes lunch a breeze and means I'll usually go there rather than grabbing a sandwich from Spinellis coffee shop