Hmm. That's strange. I actually have a lot of fun on Ghosts. My main problem with other games like Blops 1 and MW3 was the terrible hit detection. In Ghosts, the bullets go where they say they're going unless you have a bad host, which isn't all that often.
To put it out there, here's my list from best to worst CoD's (not including Ghosts because its life cycle isn't finished yet):
Blops 2, CoD 4, MW2, MW3, CoDWaW, Blops 1
At this point in time, I'd probably put ghosts between CoD 4 and MW2.