I don't know if this is done before in this thread, though I was wondering of what's your favorite episodes that's featured Sunny in her solo episodes in Tell your Tale.
Heres a list for reference:
Season 1: 

1. Sunny-Day Dinners 
2. Alicorn Issues 
3. Neighfever, with Dahlia 
4. My Bananas 
5. Another Pony’s Trash 
6. Starscout Code 
7. Pony Partay 
8. Filly Filling 
9. Foal Food 
10. Sunny’s Smoothie Movies 
11. Mission Imponable 
12. Sparkle School 
13. Moon Festival 
14. Attack of the Bunnisus, with the Mane 6 and Windy 
15. Crystal Ball, with the Mane 6 
16. Equestria’s Got Talent, with the Mane 6 
17. Snow Business like Show Business, with the Mane 6 

Season 2: 

1. Icy Prints 
2. The Lone Alicorn 
3. Written in the Starscouts, with Zipp

My favourites are Another Pony's Trash, Starscout Code, Mission Imponable & Written in the Starscouts.

Btw, I think Filly Filling is more focused on Pipp, Sparkle School on Misty, and Moon Festival and Icy Prints on Zipp. I also think On Your Cutie Marks could be considered a Sunny episode.

7968294
My favourite’s The Lone Alicorn, as it provides a great insight into the state of Sunny’s psyche post MYM.

Probably Lone Alicorn and Written in the Starscouts.

Possibly because they’re the newest and most hot (stop it) but also because of how they explore Sunny’s character. I love episodes like that.

7968294
I'd say Sparkle School, Icy Prints and Written in the Starscouts.