flash is a great tool(and was the language i personally first started out in), but it's also a massive potential pitfall because of the fact that you can draw/put stuff right on the screen, this means it's very very easy to do things in an inefficient manner, and give yourself major headaches down the road when you rely on things being placed in the world, instead of spawned via code.
Sure, it's not hard to get something on the screen, but I've never actually seen a commercial game written in Flash. Correct me if I'm wrong.
Didn't thing you guys would disagree with this, so don't really have any "sources". I more or less meant to hint at the fact that most companies are hiring people with experience in web-centered games, using javascript, c#, html etc. It's just something I found as a new graduate In the futile process of looking for a CS job (poor me lol). I kind of wish I didn't specialize in C++/graphics from the get-go and went into html and javascript instead, as now I have to learn it and it's booring as fudge after learning a very low level language. Just my h.o feel free to disagree.
What? Where are you looking for a job? The amount of browser-games are relatively small compared to mobile games or PC/console games.