Metric.
I used to think I wanted an inch-pattern FAL, until I examined the p-grip and started pricing parts & whatnot. The inch-pattern p-grip is terrible.
The folding cocking handle is kind of cool, but I prefer the large, easy to find in a hurry, metric version.
Inch-pattern rifles tend to have the last-shot bolt hold open disabled, but it's easy to re-enable them, so that comes out in the wash.
Metric magazines are dirt cheap. Reportedly, you can use these in inch pattern rifles, but they'll be a bit loose in the mag well.