I used to be a frequent rider of the G line. Nothing has changed other than the extension to Church Avenue, even then there hasn't been much change. I've seen quite a bit while riding this line though. Everything from track fires, to battery runs, to random station skips. Halfway through my ride at Myrtle-Willoughy our train was evacuated due to a smoke condition on the first few cars.
Battery runs aren't all that rare but they are short and sweet when I catch them. Usually making major stops like Metropolitan, Bedford Nostrand, and Hoyt. A few times we just skipped a station due to police investigations without notice beforehand.
The G is usually on time, though its frequency makes it easy to be on time. In the mornings during rush hour the frequency can feel very long, even though the trains are really only 5-8 minutes apart. What was nice however was catching the F via Crosstown, those were always interesting runs. Especially when one of those times it was a R32 F. Nice to see some change on the G, cause it does get quite boring.
I have yet to ride a R160 through Crosstown, which sucks, but I've seen it and I've always been on the wrong side of the track to take it.