According to the recent NYPIRG Straphangers Campaign State of the Subway report, the G train is more likely than average to break down (not fun when trains are scheduled so far apart to begin with), and is the system's dirtiest line (even more disgusting when one considers that the MTA only needs to clean 4-car trains - and fewer trains at that) - tens times dirtier than other subway lines.
The Straphangers Campaign couldn't provide crowding data for the G, since the MTA does not take platform ridership crowding assessments as for other subway lines.
The G's report profile can be found here:
And here's the main link to review methodology as well as reports on other lines.
Question: Does the State of the Subways report profile for the G line match your own G line experiences?