Quote12s is good with the right setup, 15s is good with the right setup, it's all about balance.That's a true statement. However, I have witness many times in ordinary Roper, that many do unnecessary tricks and movements that consumes the turn time to a ridiculous proportion. Which itself isn't necessary. In ZaR you must push yourself regardless of map and I have played on all types of maps, even hardcore maps and I have done just fine. Sure the destructible element can help to provide easier route but this again depends on the map and crate location. In Roper, there is more likely to be raped by a crate compared to ZaR due to destructible terrain. Also you get 2 worms to navigate wherever you see fit.
So to me, 12s is more ''hardcore'. Why? Less wanking, get to the point.
I knew everyone would vote 15s, everyone here are too predictable
