I moved from Australia where I only ever dabbled in social tennis maybe 20 times, to Malaysia where I took it up seriously, to Texas, where I continue to play.
Australia: I only ever played with my wife and a couple friends. The level (for all of us) was terrible!
Malaysia (Kuala Lumpur): I took lessons and improved really quickly to ~3.25 level. The general level is pretty good I think. Many young kids were playing the sport — I was beaten a few times by a nine year old boy, and a 13 year old girl (I'm 35 now
There are many public courts available at super-cheap rates and even free.
I entered one local tournament (all ages) for fun and the level was pretty good I thought. Lost in the first round but only because I was pretty bad. The nine year old kid made it through to the third or fourth round! Watching the last few matches was pretty impressive for a local tourney.
Texas: Continued to play and have improved a little more. Joined a local league where I played well in 3.5, and am mid-level in the 4.0s. Main difference I see is the ages of people playing here, at least in central Houston: players are generally older than in KL. Not seeing as many teens or 20s playing, but it could be simply because I'm not playing at a University court. Another difference between KL and Texas in terms of 30+ year old play is in the US people try to play harder/faster/more aggressively, whereas in KL players were more crafty. Maybe it's due to it being 90F+/95% humidity every day and no one wanted to run unnecessarily.