I think for being emotionless and based in logic the Vulcans came across with a lot of anger.
All you have to do is look towards the episode Strange New World to figure why the Vulcans' are grumpy.
Starfleet captain wants to beam down to a newly discovered world without doing any type of evaluation, despite your advice, would cause me to have fits of pure anger...
"Oh my god! Are you fucking retarded? We could step off the shuttlepod and drop dead from some alien bacteria! Please don't tell me you're the most intelligent Captain Starfleet has!"