Here's mine.
Best:
Yes Man -- The whole SMOOCH thing was just so nice of the girls.
Project Loud House -- Heartwarming and cool at the same time.
Community Disservice -- Sweet, and the bit with Lana was funny.
Any Given Sundae -- Seeing Lily get her first ice cream was really sweet.
Raw Deal -- Hilarious!
Cereal Offender -- It was nice seeing Lincoln get his cereal.
It's a Loud, Loud, Loud, Loud House -- I know this episode is controversial, but it's a satisfying ending, and Luan's little dance was cool.
The Price of Admission -- It's nice how the parents didn't punish Lincoln.
April Fools Rules -- Another controversial episode, but I found the ending gag funny.
Really Loud Music -- I really dug the ending song.
Worst:
One Flu Over the Loud House -- You can't get much more of a downer ending than the whole household sick.
No Such Luck -- For obvious reasons.
Linc or Swim -- While the episode as a whole was fun, the ending was a bit too unsatisfactory and gross.
Brawl in the Family -- Because I don't like the implication that they'll do the protocol again.
Sleuth or Consequences -- The scene just before it was sweet, but the "time for number two" part was just gross.
Two Boys and a Baby -- For obvious reasons.
Ruthless People -- I actually like this episode a lot, but the ending was a bit disappointing.
Get the Message -- Another episode that I like a lot, but has a slightly disappointing ending.
In Tents Debate -- I don't hate this ending as much as other people do, but still a bit unfortunate.
The Loudest Yard -- Ditto