I shoot 30 on my 7200, 60 is not an option at 1080p. No need to shoot 25, 60 would be a nice option on that camera though. As KC mentioned, its about being able to slow it down. the 25 and 30 comes from the days of PAL and NTSC i guess, NTSC (30) is the north american version, PAL (25) is the European model. PAL was a bit better as it had more resolution 720 x 576 as opposed to NTSC which is 720 x 480. And then there is movie film which is/was 24 fps... But I think its all mumbo jumbo now
The key thing is to keep the same ratio: if you shoot at 30fps and 60fps you are golden. If you shoot at 25 then you will want to mix that with 50. don't mix 25 and 30 or 25 and 60 sort of thing. Stay consistent..