I think Counterstrike style gameplay is well suited to being adapted to VR. I think the two things mix well for two reasons:

1) The map layout and scale. Counterstrike maps are usually made with 2-3 hallways basically that players are funneled down. This imposes around 90 degrees of vigilance upon the player, enemies will be coming from only a limited number of angles and players will not be constantly turning while looking for targets. I think that imposing too much duty to be vigilant on the player tires them out by making them turn too much as well as stresses them out due to the heightened realism of VR.

2) Fatigue. This overlaps a bit with my first point, but player fatigue is further reduced by the round format of Counterstrike gives players a bit of time during gameplay to sit down, relax, and not be constantly playing the game. 
I get tired a lot faster playing stuff like Contractors or VR minecraft that requires you to be active and looking around the whole time.