Despite not liking Tom Cruise, I watched the MI series over the summer, and MI5 the other week, and I did really enjoy the series. He does amazing stunts, and 5 had phenomenal action scenes. I've also enjoyed the ensemble casts/cameos throughout. I wasn't crazy about the humor in 5 though; it broke my concentration if that makes sense. I had also recently watched the Bourne Legacy and it was a little odd/distracting that Jeremy Renner was in both, since they are sort of rival series.
(Any good spy movie recommendations? I've seen all the Bond and Clancy films too).