My top 10 favorite episodes are:

1. Lurch Learns to Dance
2. Cousin Itt and the Vocational Counselor
3. Thing is Missing
4. The Addams Family Tree
5. Cousin Itt's Problem
6. Morticia and the Psychiatrist
7. Morticia Joins the Ladies League
8. Christmas with the Addams Family
9. Fester's Punctured Romance
10. The Addams Family in Court

Wow!! That's hard cuz I like 'em all, but here's my 10 faves (not nessecarily in this order)

1. Lurch & his Harpsichord
2. Mother Lurch comes to visit
3. Lurch's Grand Romance
4. Lurch, the Teenage Idol
5. Lurch's Little Helper
6. Lurch Learns to Dance
(I'm a Lurch fan, can't you tell?)
7. Uncle fester goes on a Diet
8. Halloween-Addams Style
9. Christmas with the Addams Family
10. Ophelia's Career

1: Morticia's romance part one (haven't seen the second part :( )
2: The Winning Of Morticia Addams
3:Amnesia in the Addams Family
4: Gomez and Morticia vs Uncle Fest and Mama
5:Gomez the people's choice
6:Morticia's Delimma
7:The Addams Family goes to court
8:Happy Birthdays Grandma Frump
9:Cousin Itt and the Vocational counselor
10:Gomez the Cat Burglar

1. The Great Treasure Hunt
2. The Addams Family Goes To School (because the real house "21 Chester Place" was used in the beginning)
3. Lurch And His Harpsichord
4. Halloween - Addams Style
5. Christmas With The Addams Family
6. Cousin Itt Visits The Addams Family
7. The New Neighbors Meet The Addams Family
8. Fester's Punctured Romance
9. Morticia's Romance part 1
10. Morticia's Romance part 2