My fastest time is 18:??, by way of the little fire-breathing birdie (what is that, anyway?) which I'd completed before. Before that, I had around 20 minutes, because it kept giving me Baldwin and I got MLG at it.
I like it HARD. I mean, I like getting 10,208t. That's some sweet cash. And it's not even THAT hard. Last Christmas, me and my parents bought this hella fine wooden puzzle of some Japanese woodblock print, and it took us over THREE HOURS to finish it. With two people (my dad was acting in more of a managerial role-- white helmet and such)!
My favorites are the aforementioned bird, Swipp's and Pinkerton's (because having loads of different objects is great), and, oh, what is that thing called. Green and red lizard-bat looking' thing? And the scryer! Think that was the first one I did-- took me over an hour. And probably others I can't think of right now.

Go home, Dragonhome.
My least favorites are the landscapes (Starfall Isle and Windswept Plateau aren't that bad, tho'), because everything looks the same after you reach a certain point. Then it becomes about matching the shapes more than anything. The worst by far? The Scarred Wasteland:

This is how it looks when it's finished.
Just look at that abomination. I suppose it's only appropriate.
Easiest? Well… the ones I mentioned as my favorites. I'm such a jobber. But in my defense, those are also some of the most visually interesting ones!
Hardest? Again, landscapes. Nests can also be a problem; Lightning, no problem, but Ice? Ice nest hates me. There's also that black and white Tundra one (a lot of those two-dragon puzzles can be a bit dicey), which is a total nightmare once you've finished the black border and scanlines. Also, the two guardians who are almost the same color yellow. Or the white Imperial against the white background. The deities are also a hassle, especially Plaguemom and Windsinger (but I'm not much better at Bossdad).
Method? I always do the logo first, throw that in whatever corner it goes in, then do the border, trying the make sure the lose pieces won't cover everything up once I connect the border-bits (that always do). Then I usually just work inwards from there, more or less.
As for the future, well. More puzzles, of course. I'd also like bigger ones-- both in number of pieces and dimensions. And more work room, because you don't get nearly enough.
I'd also like it if they removed the coin animation (as satisfying as it can be), because that often causes my computer to lag and puts the fear of god into me that it'll disconnect. I've got too many "just a few more pieces-- DISCONNECT" stories to even remember.
SEDGE'S HIGH (uh, low) TIMES
Tomo: 25:18
Crim: 22:23
Baldwin:
21:37 16:32
Scrying Workshop: 28:19
Stormcatcher: 35:01
Windsinger: 35:44
Plaguebringer: 28:06
Fire Coatl: 44:19
Nocturne: 34:50
Spiral: 27:08
Light Sprite: 25:19
Lightning Sprite: 31:00
Nature Sprite: 27:16
Nochnyr: 31:39
Shadow Nest:
31:32 27:56
Plague Nest: 31:16
Viridian Labyrinth: 42:21
Puce Robot (?): 28:35

And on your left you'll see the only unemployed person in the entire Lightning flight.
(If you respond to me, please ping! No posting history is a drag, man.)