The Special Edition Truffle & Gardenia is probably my favorite one (followed by the Lychee & Lapsang, then probably Pink Lotus and Bourbon). I have almost all of them, and they all smell pretty good, though the Cucumber Water really wasn't my thing (a light, watery cucumber scent with a little bit of floral, very slight melon scent...but I hate Cucumber Melon scent). The Truffle & Gardenia smells overwhelmingly floral in the container. While burning, that tones down a bit, and on my skin, the floral is rather light and the truffle comes out more. LOVE it.
As for the Dark Vanilla, I found that it smelled quite a bit like vanilla (the box states that it's Vanilla Orchid and musk with a liquor finish, so it is NOT going to be a baked goods, your typical vanilla scent). I thought it was alright, but on my skin, the vanilla scent came out more and I didn't like it and gave it to my mother.
The only ones I haven't tried are the Absinthe & Sugar Water, Grapefuit (both because I don't like citrus scents...people say the A & SW one has lemon in it), and the Fig Leaf and Black Currant. I've never seen those two in stock, though I don't think I would like them, especially the Black Currant one because I don't like berries or berry scents.
In all honesty, they all smell awesome, you just have to go by which scent you think you would like the most...Jimmyjane's website lists all the notes in each candle scent, that should help you decide which one you might like.