I like Thai fishermens' pants. I have a pair similar to
http://www.ebay.com/itm/UNIQUE-PATCHWORK-THAI-FISHERMAN-YOGA-MASSAGE-PANTS-HIPPIE-TROUSERS-BLACK-B7-/160653710722 and a pair similar to
http://www.ebay.com/itm/UNIQUE-PATCHWORK-THAI-FISHERMAN-YOGA-MASSAGE-PANTS-HIPPIE-TROUSERS-BLUE-B4-/160654312014, both of which fit very well, as well as purple rayon ones that are huge but very lightweight, and some red-brown ones I don't like as well.
They seem best with something casual for a top, like a t-shirt or tank top or the like. Great for warm weather, not so much for cold.

I like the styles that have a contrasting fold at the top, but it'd probably be pointless for me since I tend to wear long t-shirts.
I've also wanted to try harem pants, but haven't done so yet. I did try "pirate" pants with wide straight legs that have a very skirt-like effect, but I found I don't like them because of length (about halfway down the calf) and only use them as pajamas. Maybe something with lots of fabric that way but a longer length and a wide cuff at the bottom.
(The pirate shirt though? I like. I'll have to get one in white too, and if it comes in purple...

Mine has no ruffles, but long ties at the neck which hang down, and big sleeves, and is generally oversized.)