I said in my opinion, I used to think my beams were the best, till I got owned by a melee player, then I thought my melee was great till I got owned by a beamer. I've had melee fights where I thought my reflexes were good but they weren't good enough and I've had fights where someone had a good strategy that beam me all the time.
In my opinion, you need to be good at all so that you can combat any situation. If you're playing against noobs (and I'm not saying that anybody here only does this, I'm just using it as an example) You can be good at anything and you'll win. Eventually you'll come across someone who can handle your current tactics. When that happens you'll learn new strategies and combinations to beat him. Only when you're good at all will you be able to handle anything thrown at you.