i think you will love halo 5 my friend!! im up to mission 4 and loving it so far, its fast and smooth and the gameplay is tight
as for mgs 5 it was ok but lacked any real story or set peices and it became very samey after a while with very similar missions and locations, its always either extract or rescue someone over and over again
it really needed some variation in the missions and locations and a bit of story would have been nice, thers nothing that really stands out as memorable, wheras mgs 1, 2 or 3 had loads of stand out memorable set peices
i enjoyed the game but it was getting boring towards the end