Agree Bethberry,
Maril's thread was inspired, beautifully written and achingly LOL-inducing!
A few that I often think of
The light in Frodo's face
Coffee!
Linguistic Puns, Riddles and Jokes in LoTR etc.
Of course the Epic Chapter by Chapter
also 'It feels different near the Shire' (my search-fu is weak)
For sheer 'awwwww' value
Lalwende and Davem announce their engagement
And for the terrible guilty pleasure of looking at my favourite own post (off-colour though it be)
Waste systems in Middle Earth