I can't find anything quite like you're looking for, but here's a few crocheted sweater patterns that have patterns going across the chest and sleeves:

http://www.interweavestore.com/Crochet/Patterns/Northern-Dreams-Pullover.html
http://www.e-patternscentral.com/detail.html?prod_id=3701&cat_id=277&criteria=
http://www.crochettoday.com/crochet-patterns/nordic-pullover

http://www.AnniesAttic.com/crochet/detail.html?prod_id=13206&cat_id=925

Annie's Attic has a book of crocheted bootie patterns that includes roller skate booties.

If you don't feel like paying money for a pattern, you could always use a basic high-top bootie pattern (there are lots out there), then add small balls for wheels on the bottom.

I looked around a bit and the only thing close that I could find was this crocheted house elf pattern for sale on Etsy:

http://www.etsy.com/listing/75417119/house-elf-amigurumi-crochet-pattern

Stick a paper clip into the first stitch of your round, then you can see where it is to join into and continue.  Then move it up into the first stitch of the next round.  It makes it much, much easier to keep track of where the round started, how many stitches you've done so far, and where to join.

There's absolutely no reason to not use acrylic if you don't mind working with it.  There's a lot of very soft acrylics on the market now that I find quite pleasant to work with, and with the exception of some cotton yarn, acrylic is the only yarn in my stash.  I had some quite old acrylic yarn given to me that the original owners didn't want anymore, and after trying to use it, off and on, for years, I came to the conclusion that it was too unpleasant to work with (and in colorways I don't like, and produced a not-soft finished product) and donated it to Goodwill.  That yarn was, indeed, terrible and scratchy and squeaky on my metal hooks and gave me blisters on my fingers as I tensioned it.  But newer acrylic is very nice generally.  Some brands are really soft and nice, and other brands are not as soft, but softness I think really doesn't matter much for things like amigurumi (and a lot of it gets softer after washing which makes it good for blankets and wearables).

Anyway, it's pretty much just personal taste.

They're all quite adorable!

What did you use to crochet them out of?  Embroidery floss? Really lightweight thin yarn?  Thread?

I particularly like their little costumes, and how much personality they imbue them with.

I have no photos at the moment, too busy trying to finish up my projects in time to stop, take photos, download photos onto my computer, upload photos to Craftster, etc.

My anniversary is on Friday, so I'm trying to get a couple of presents done for my husband that I've been working on for entirely too long.  I'm trying to figure out a good strap for a sleep mask (hard to do when I don't know how big around his head is or how the mask is going to fit yet...I might just wait until after I give it to him to finish it).  I'm also trying to finish up a crocheted Companion Cube (from the game Portal).  I found the pattern on Ravelry, and it's extremely cute, but man, are there a lot of pieces.  Here's hoping I can finish it by Friday, who knows if I'll find the time with two kids running around all day.

That stitch looks really lovely, I hadn't heard of it before.  I'm going to have to try it out, it looks just perfect for jewelry!

I love the blue and white combo, and the straight lines across the circles really make things pop.  Very nice.

I like to put a button or bead on the beginning end of my chain, loop the free end through it a couple of times, then tie a very small knot on the chain side and weave the rest of the end in as normal.  Then, on the other end of the chain, I chain a few extra stitches, then slip stitch it several stitches away from the hook to make a loop that's the right size to fit over the button or bead, finish off and weave in the end as normal.  It's worked pretty well the couple times I've tried it.  Alternately, you can get a crimping bead and use that to hide a knot/end inside.  If you do tie a knot, you can put some glue on it to help it hold and not fray out.

It looks like a pretty standard pixie hat.

There's a free pattern here that would probably work with a few modifications (leave off the pompoms, and maybe do a couple of rows shorter):
http://www.garnstudio.com/lang/en/visoppskrift.php?d_nr=93&d_id=1&lang=us

You could probably search Etsy and come up with some great (paid) patterns as well.