Horribly biased opinion but I have never laid eyes on a tiny cuter than Crobidoll T-line Wooyu! uvu the little guy has won my heart a million times over and is also the reason I have and will consider any kind of tiny dolls!
Luts Tiny Delfs are super adorable -- I love their huuuuuge eyes and chubby little cheeks! Your Dorothy is perfect I sort of want a tiny Centaur version
She's the cutest little thing, Brownie Haha, hope it's ok if she's naked... I should have bought more when they were cheap.
Those little Dollzone fairies are gorgeous...I love tiny dolls that still look grown, instead of the babyish look most have(though those are adorable as well)
Pipos are the first tiny dolls I fell in love with though I also like the new Tiny Delf20 dolls, but if I were to go with cuteness then PukiPuki win for me uvu
Peak's Woods tinies and SoulDoll tinies *___* My all time favorite would be PW FOF LE Lady Alice in blue-grey
Awww they're all so adorable!!! every time I go to the Crobidoll website everything is sold out X_X I want one of their tinies I will name my Puki Sugar(pink hair) as the cutest tiny doll for me...I'm just so in love with her and the first day she came to me I was very very happy!
I'm totally in love with dreamhigh studios faeries! I so want one some day! They are so adorable and otherworldly, and I love glow in the dark thinks especially! One day...
I'm in love with iplehouse Irene, she's technically a tiny according to DoA. But I also like all the tiny pipos anthro's!
I will vote for the two very beautiful Pukifee Mio & Ante in somebody's tumblr~ I really like other bjds too but those two were just stunning in the photo~
I am not a fan of tinies at all (I like 'em SD+) and until I saw the IP Nami someone posted earlier in this thread I was going to say the only tiny I would consider getting would be Doll Legend's Parado. I love his pouty mouth and elf ears, but Nami is just soooooo cute. So I'm tempted twice.
In terms of beautiful, mature tinies from Soom, DIM, Lume, and Xaga Doll are top of the list for me. The cutest are Fairyland's Puki Pukis. I have a Cupid, and she is adorable.