I Loveeeeeee TWIRL the Veryyy Softest but Soooo COZY to Wear!! Twirl is sooo Versatile can be Used for Everything from Quick Baby Items to Adult Ski/Outdoor Wear !!! Sweaters/Hats/Mittens/Coats !!! Bulky Wool of the Andes is Nice but just Doesnt have the Same Look & Feel of Twirl ...and did I forget how Inexpensive it is from KP's ???? Huge Bang for the Buck when you could Easily Pay $15. To $26. dollars a Hank for it Elsewhere !!! Wow @ $3.99 a Hank KP's Price Need I say more ???
I love Cotlin. It's a wonderful yarn for warmer climate sweaters--very elegant look, crisp stitches, and gorgeous colors. I'm really looking forward to the new Gloss Lace as well. Actually, I've used so many of your yarns and never been disappointed. It's really hard to pick a favorite.
Alpaca Cloud will felt, but not very evenly (like most alpaca yarn). It's spun more tightly than wool yarn, so you might get places that won't felt up at all while the others are super-felted. You could test swatch it and play with your gauge to see what kinds of effects you can get, though.
Anything alpaca. Andean Treasure, Andean Silk, Alpaca Cloud, Elegance - if it's Alpaca, I love it! If I could, I'd make everything in the world out of Andean Treasure. But, for practicality's sake, I'd say Swish is my favorite. It's such a great all-seasons wool, comes in great colors, and I can wash it - perfect! It is so soft that it's easy to forget it's wool. It shows textures well, wears well, and is so versatile. There's just not enough good stuff I can say about it. :)