Sometimes I can tell where my ESL coworkers learned English based on phrasing and idioms. It would be interesting to come across someone who honed English skills with such a domain-specific application.
Since I spent a lot of time in english-speaking professional environments for the last few years I managed to deviate a little bit from "Friends style" speak but I still end up saying "like" often if I start rambling.
A lot of people I know also have a bit of a vice with the word "like" and picked it up from Friends as well, it's an interesting thing to notice.
There was a pretty interesting cluster of threads here on HN a while ago about English in business environments with lots of anecdotes about learning English in various "non-English" societies.
He honned in the Ricky pretty well I thought it was a gag but no its how he learned.