My comic book days were post-Silver Age. I thought the coolest of the cool at that time was The Vision. I keep holding out hope that he will show up in the movies.
Judging from the previews to Thor, The Dark World, they'll be pulling him out of Asgard jail to help Thor in this movie. It will be interested to see how his role plays out.
The thing that has me the most excited for Days of Future Past, since it's obviously not gonna follow the comic story arc and just borrow the idea of it, is that Bryan Singler has stated it's gonna fix the mistakes of X3.
Now all we'll need is the Deadpool movie to take out the first Wolverine movie out of existence.