The 320033 is the G chord I always play. I used to play it just 320003, but once I found the alternate, I never looked back. It always transitions well with a Cadd9 chord X32033. The G-Cadd9 chord progression pretty much fines me as a guitar player. It's my favorite chord progression even, and has so many possibilities for variation and bass runs and all kinds of good stuff. If there's a G followed by a C in a song, I will automatically make it G-Cadd9 so I can pull of fun little things in-between. As in the UK they'd say, the "twiddly bits".