During my childhood, it was always a big deal when one of them was on on a Sunday evening. Of course they didn't age so well and some of their dialogs and effects are risible, but their tongue-in-cheek humor and action is still fun to watch, despite of all the cheesiness.
Of course Skyfall is superior in almost every aspect of film-making, but like I said in the film's discussion thread when it came out: I'm missing the fun part a little bit. Ever since the Bourne movies every action film seems to need shaky cams, super fast editing, a brooding hero and a pessimistic atmosphere.
For me, the last two Mission Impossible films were actually the best Bond films for ages. I still liked Skyfall just fine, so your judgement may be a bit harsh, but maybe it's time for the franchise to take itself a little less serious again.