I don't have favorite posts, because each of them are composed for different purposes - usually to instruct, sometimes to amuse, sometimes to save information for me to refer back to, or to store good music or personal memories. No way to figure out what is "best" in that eclectic mix.
But I do have one favorite category - humor. You can always go directly to those posts in the right sidebar under "categories" (or go to the link in the previous sentence). But there are a thousand links there (and about 50 just for 2019), and that doesn't inclue the humor embedded in the gif-linkdumps. So what I've done for this first new year's post is to extract from those linkdumps in 2019 all of the gifs that were filed as being cheerful or humorous. They are arranged from January to December, so you can stop when you start remembering them.
2019 was not IMHO a cheerful year to look back on. But these links gave me moments of joy on days when the internet was a gloomy or depressing area to browse. I hope this conglomeration of them will help start the new year on a more upbeat note.
(I haven't proofread these links. Some are a year old, many will likely have undergone linkrot, and some may be duplicates.)
Girl with alopecia goes on a first date
Brain-damaged dog has "happy trots"
Deaf child visits Santa Claus
UPS delivery man greeted by local squirrel
When you're not a "morning person"
Girl gives her scarf to a homeless dog
Toddler dances to music of buskers
A compilation of four-generation families
Be careful of that step
People work together to save a dog
Man admires old car in parking lot (story at the link)
Child playing hide and seek
Helping a deer on a frozen lake
Leaving the house with wet hair in the winter
Man rescues dogs from garbage dump
Boy in wheelchair gets to enjoy trampoline
Beth does not need more sambucas
People dressed up as carwash brushes
Good boy is done shopping for the day
Nice dance moves
Sharing your skateboard with your dog
Dogs enjoying their day
Dog meets toy frog
"Zoomie riot" at dog park
Bird gathers nesting material
Happy girl dancing
Happy, happy cows
Classic Looney-Toons cartoon
A dog gets adopted
"Down you go" (licks paw)
Block-stacking (this may be a repeat, but if so, it's worth repeating...)
Sloth waves thank-you to human bro
Lady gets her hair colored green
Hard to describe in a few words...
Unexpected gender reveal method
Buster Keaton compilation
Dog wearing "cone of shame" meets cat
Toddler's first steps
Dad gives his daughter a surprise gift
Man can't find his phone
Filmed in a "typical British pub"
Infant's first glasses
Dog helps his human
Girl asserts dominance over her sibling(s)
A couple propose to each other at the same time
Making children happy
Father gets a pretend vaccination
Dog returned to his owner
Girl with knife at carnival ride
Dogs happy to return home
There are two types of dogs...
Clever lip-sync of Bo Rhap (best comment: "this is why girls take so long to get ready"
Who will catch the bride's bouquet?
Sexuality education video
Babies don't like to have grass touch their feet
Fire fighters in the Amazon celebrate
Prank to pull on a small child (wooden spoon would be better than a knife)
Children surprise a classmate
Halloween decoration gets called away.
A boy gets a dog.
Dogs and cats jump around.
Girl learns she will have a baby sister.
Tucking in your best friend at bedtime.
Homeless man gets a new jacket. Perhaps a repost, but worth revisiting.
Children can get lost in a city
People hearing sounds for the first time
Man feeding baby birds
Man rescues turtle
Thoughtful Christmas present
Playing with a ball
And two I found today -
Learning how to muck the animal stalls and dispose of the waste
and one from the "better every loop" category. I left the loop running this morning and laughed until my ribs ached.