I was the same way. I had it continuously drilled into me for years that cavity back irons were pretty much a requirement to play good golf. Like almost every serious golfer, I had a set of PING Eye2's in the bag for quite a while. I even moved to the i3 "blade's" years later and played some exceptional golf with them. Making the switch to a forged blade made me a better golfer though. My practice became a lot more productive and my good shots became more and more consistent. It really was an eye opening experience. It's a great feeling when you put a good move on the ball and just know that you knocked it stiff. I get that feeling more often with my blades than I ever did with my i3's (even though I had a lower handicap with the i3's -- a result of practice, not equipment).
One problem that actually drove me to blades was offset. I had two types of ball flight with my Pings, slight draw and hook! I had to really work hard to move the ball left to right. With my irons now my natural flight is a tiny fade which is exactly the way I want it!