Only Fools and Horses By the Numbers

Since I love you people even though you've treated me like a rented mule for 10 years, letting me mercilessly pounds away millions of words for no thanks, I've compiled my Only Fools and Horses season ranking. This was done very scientifically, meaning I looked at a list of the episodes and took maybe 2 seconds to give each one a number from 1-10, 10 being the best. Then I calculated the average score for each season. (NOTE - I didn't include all 19 Christmas specials.)

The results. And you're welcome:

Season 5: 8.83
Season 6: 8.67
Season 3: 8.26
Season 7: 8.00
Season 2: 7.71
Season 4: 7.71
Season 1: 7.67

Avg for the 30 minute shows (Seasons 1-5): 8.03
Avg when they switched to 50 minute shows (Seasons 6-7): 8.33

Lowest rated:
               Cash and Curry (4)

Highest rated:

Big Brother (10)
Go West Young Man (10)
A Touch of Glass (10)
Healthy Competition (10)
Friday the 14th (10)
Happy Returns (10)
Strained Relations (10)
Sleeping Dogs Lie (10)
From Prussia With Love (10)
Video Nasty (10)

Yuppy Love (10)

Danger UXD (10) 

Three Men, a Woman and a Baby (10)

Season with most 10s: Season 4 (3 10s)
Season with least 10s: Season 2 (1 10) Season 7 (1 10)

Each episode, graded:
Season 1

Big Brother (10)
Go West Young Man (10)
Cash and Curry (4)
The Second Time Around (9)
A Slow Bus to Chingford (7)
The Russians Are Coming (6)

Season 2

The Long Legs of the Law (6)
Ashes to Ashes (8)
A Losing Streak (8)
No Greater Love... (8)
The Yellow Peril (7)
It Never Rains... (7)
A Touch of Glass (10) 

Season 3

Homesick (9)
Healthy Competition (10)
Friday the 14th (10)
Yesterday Never Comes (8)
May the Force Be with You (8)
Wanted (6)
Who's a Pretty Boy? (7)

Season 4

Happy Returns (10)
Strained Relations (10)
Hole in One (6)
It's Only Rock and Roll (6)
Sleeping Dogs Lie (10)
Watching the Girls Go By (6)
As One Door Closes (6)

Season 5

From Prussia With Love (10)
The Miracle of Peckham (9)
The Longest Night (9)
Tea for Three (9)
Video Nasty (10)
Who Wants to Be a Millionaire? (6)

Season 6

Yuppy Love (10)
Danger UXD (10)
Chain Gang (7)
The Unlucky Winner Is... (7)
Sickness and Wealth (9)
Little Problems (9)

Season 7

The Sky's the Limit (7)
The Chance of a Lunchtime (7)
Stage Fright (7)
The Class of '62 (8)
He Ain't Heavy, He's My Uncle (9)
Three Men, a Woman and a Baby (10)