I'd say Research assistance, as they help me quickly sift through large datasets and provide valuable insights, but I'm curious, have you considered 'Data analysis' as an option?
I'd pick Research assistance, as they help me quickly summarize long documents and provide insights, but what about data analysis - is that a common use case?
I'd pick Research assistance - I use agents to summarize long reports and find relevant studies, saves me hours. What about for complex writing tasks, do you find agents helpful?