A list of my favorite Deep Space Nine episodes. They're not really in any particular order, since I can't make up my mind about which I like best.

Yes, most of these episodes have Garak in them, but that's not necessarily why they're my favorite episodes. Sometimes, I just don't know why.

(Season 6) In the Pale Moonlight
(Season 6) The Magnificent Ferengi Because it makes me laugh till my sides hurt.
(Season 4) The Visitor I can't precisely say what it is about this episode, other than I think it's nearly perfect. I think it's because, knowing the relationship between Jake and his father, it's so believable, yet heartbreaking.
(Season 6) Far Beyond the Stars
Defiant (Season 4) Homefront & Paradise Lost Probably because I agree so strongly with Joseph Sisko says. If we stand for certain things and then take away those ideals, what do we have left?
(Season 5) ...Nor the Battle to the Strong No, I don't know why I love all the really depressing episodes that center on Jake.
(Season 2) Shadowplay
(Season 3) Explorers I also really like the episodes that explore the relationship between Jake and Sisko.
(Season 5) In Purgatory's Shadow & By Inferno's Light
(Season 3) Facets Odo as Kurzon.

(Season 6) Rocks and Shoals Oddly enough, Michael dislikes this episode. I think that the camera on the battle between our heroes and the Jem'Hadar is fantastic.
(Season 2) The Wire
Bada-Bing Screen Shot, Promenade(Season 7) Bada-Bing Bada-Bang For the scene when they're walking down the promenade to Vic's.
(Season 3) The House of Quark
(Season 5) Looking for par'Mach in All the Wrong Places
(Season 3) Improbable Cause & The Die is Cast I particularly like the interaction between Garak and Odo.
(Season 1) Duet
(Season 7) Take Me Out to the Holosuite "Death to the Opposition!"   "What flavor did you infuse it with?" "Scotch"
(Season 6) One Little Ship Just for the closing scene between Worf and Jadzia.
(Season 1) If Wishes Were Horses
(Season 3) Second Skin
(Season 1) Move Along Home

Links:

DS9 Trekpulse Multimedia as well as screen captures
Frogstar Star Trek Page DS9 Miscellany