I've always thought that all bosses should drop a mini of themselves (VERY rare occurence, of course) when you kill one in Hard Mode. That's reall the only new mini's I'd like to see. They eat too damn much, keep you awake all night, and just make a mess of everything.
I am very very happy with what I have opened, the only thing I wish is that there is some way to garentee you do not end up opening up a duplicate on your account. Nothing more frustrating then having a nice set that you opened up (all yours not purchased ones) and you end up with a duplicate mini... ;( For me it was a duplicate Palo jako, I was happy to trade it for a hydra, which was a downgrade. But I liked it still... and it was not duplicate that way.
I am sure thats PART of the reason the 2nd bday presents were unique was cause it would have really been a sad day for some people to get a duplicate of what they already got. ;( That 2nd tier helps assure that you would not get a duplicate as easily.
Oh and for a 3rd Bday present... I like the mini Duncan green please!!!
However I would prefer a Transmorgrapher cube... Place a mini in the cube and double click on it. and you are transformed into that creature for a limited period of time. In the spirit of the candy corn and elf potions from prior holidays. Would be cool for holiday events!!! Mini destroyer please!!! BOO! lol
Or better yet, a mini Grawl. BOOMBA!!! lol oh wait I would get body blocked out of town if I did that this halloween. lol