On the one hand I think that's reading too much into the phrase "Haskell guy", but on the other I disagree in the sense that being a dilettante is no good eithe

On the one hand I think that's reading too much into the phrase "Haskell guy", but on the other I disagree in the sense that being a dilettante is no good either. I think people should be "T-shaped", deep on one to a few languages/platforms and some experience with many others. Spending a long time with one language/platform will teach you deeper lessons over time than switching every 6 months.