My list:

Tie between ESB+ROTJ
ROTS
ANH
Shadows of the Empire (Not a movie score, but whatever)
TPM
TFA
AOTC

ESB/ROTJ:
I watched ESB and Jedi the most as a kid, so I picked up more favourite pieces this way and they stuck with me the best. My favourites from ESB are Battle of Hoth, Attacking a Star Destroyer, Yoda and the Force, Leia/Han’s theme, Boba Fett’s Theme, that-one-choir-bit-as-they-enter-Cloud-City and Clash of The Lightsabers. ROTJ mostly reused older pieces but I do enjoy Den of The Rancor, Sail Barge Assault (and it’s alt version), Emperor’s theme, Farther and Son, Battle of Endor 1-3 (specifically A Jedi’s Fury) and Victory Celebration.

ROTS:
What do I need to say? It’s an all around amazing soundtrack, not as memorable as ESB or ROTJ but still damn good. Favouite piece is Battle of the Heroes (who would’ve guessed) but Goodbye Old Friend is a close second (Battlefront 2 feels).

ANH:
No need for explanation really, it’s the daddy of them all, it stands the test of time. Has some atmospheric, emotional, fast paced and all around exciting pieces. But once you really start to get into classical music and listen to composers like Holst, Tchailkovsky and Korngold then some of the original magic is lost. Favourite pieces are Imperial Attack, Leia’s theme, the Stormtrooper motif, Detention Block Ambush, Shootout in the Cellbay (so underrated) and Battle of Yavin.

Shadows:
A soundtrack for a book, I guess they really didn’t have anything better to do until TPM came out. Mcneely nails the John Williams feel, his version of the main theme is easily my favourite. However, while the pieces themselves are good, they simply aren’t as memorable as the ones we’re most familiar with. Often in these tracks there are long, quiet, barely audible periods of score with nothing interesting about them. But even then, these are almost forgivable since The Destruction of Xizor’s Palace just might be my favourite SW composition ever, everything else in this soundtrack just sorta pales in comparison.

TPM:
I honestly find this soundtrack kinda overrated, sure Duel of Fates is a great piece but now it’s become incredibly overplayed like Imperial March. Battle of the Heroes was just an all around better piece in my opinion. There also wasn’t that much I liked in this soundtrack anyway, besides the Trade Federation March, Flag Parade, The Tide Turns and Augie’s Municipal Band.

TFA:
I’m mixed on this movie as a whole, but I ultimately found the soundtrack the most disappointing aspect of the movie. Rey’s Theme, Kylo’s theme, March of the Resistance and Jedi Steps all stuck with me after I left the theater, everything else was just… there.

AOTC:
Across the Stars.
That’s literally it.