Individual strength/toughness of a space marine?
I am having a really hard time figuring out exactly how many soldiers does one space marine equal? Can they face down a whole fireteam, a whole platoon, a whole battalion? They are depicted one way in the fluff, another way in the video games, and yet another way in the tabletop.
My personal idea is that even among space marines, combat skill varies a lot between individual marines: That would help reconcile the video of a single howling banshee pwning a marine with the fact that 1000 ultramarines dealt a huge blow to a hive fleet of millions.