What personas? What skits?
I remember him from SNL in a single skit, having to do with something like:
"I know you're all wondering how all this affects me... Al Franken."
In other words, playing a pompous ass.
I don't think he was acting...
That was his bit to call the 1980s the Al Franken Decade.
He was also one of the staff writers for most of SNL's lifetime.