And I'd like to know what are everyone's favorite episodes for the sitcoms listed below.

I'll be working on 6-episode sets for these shows...

Family Matters
Boy Meets World
Step by Step
Mama's Family
Green Acres
Petticoat Junction
I Love Lucy
The Jeffersons

Only list your favorite episodes of the above sitcoms.

can I get a copy of this "Best of Step By Step" you speak of?

Lucy and Ethel wrap chocolate at a candy factory.
Job Switching from I Love Lucy Season 2,Episode 1 [15 Sep. 1952]

Lucy and Ethel Install a shower Season 1

Lucy and Ethel Put Up a T.V. Antenna Season 1

can I get a copy of this "Best of Step By Step" you speak of?

I have all of it unofficially. Quality for 85 percent of it ranges from good to excellent. There's a bit at the end that's anywhere from passable to poor. This is why I'm hoping to God Warner will finally officially release it!