Following the recent departure of Will Ferrell, Ana Gasteyer is leaving Saturday Night Live. That’s a real shame. SNL was pretty lame for a while there, but Will Ferrell and Ana Gasteyer injected some much-needed humor with their great impressions and character sketches. One of their funnier collaborations was playing the middle school music teachers Marty and Bobbi Moughan-Culp; some of those sketches were classic. She will definitely be missed…