This is the problem with people who have been doing it for a long time. I remember when I used to click way back in the day, I thought I was just fine too. Not so. Like I've said before there's a difference between what you think is fine and reality. Reality is you will not be beating anyone who isn't a straight up beginner, in both pvp, dps or healing. You can't just bind a whole bunch of stuff randomly and say "Oh this is poo, I'm going back to clicking." You have to be smart about what and where you put certain abilities and then most importantly, YOU HAVE TO GET USED TO THEM. Once you do, you LITERALLY stop thinking about where stuff is. Beautiful muscle memory takes over and your fingers do the thinking for you.
All it takes is a quick google or forum search!!! A gazillion people telling you to bind can't be wrong. But beware, they're not always going to be as nice as someone like me
. You're not special, clicking isn't better for
you as oppose to binding, no matter how long you've been doing it. Put it this way...you beat a few people, you top dps in your guild, you think you're a good healer...well bind and you'll automatically be that much better. Also, play with veteran players who bind. They'll just show you. If you click and you're dps, you'll simply never max your dps out.
Also, UI's look much better and there's a lot more actual game to look at if you don't have to use the buttons on screen. By the way, binding isn't where you stop. You want to macro, macro, macro and also get used to modifiers if you really want to play well.