Kalecgos for sure. Nothing like getting one of your 10 mana Kazakus potions for free, with better stats than the other 5/5 mage legendary and represents further threats with additional 0 cost spells if he leaves past one turn.
I also want Jepetto Joybuzz. How could you say no to this card if you play any ounce of OTK decks, particularly in druid with multiple expensive minion combo pieces?
Probably Heistbaron Togwaggle and Unseen Saboteur Togwaggle I might wait a few days if I don't open it. I'm assuming I'll open at least one Saboteur, but if I don't, I'll definitely craft one tomorrow.
I want two legendaries for my Boom Warrior list I put together. Blastmaster Boom, obviously. The odd, unpopular pick: Barista Lynchen. I'm not kidding either! Kripp's Bomb Warrior list had 2x Youthful Brewmaster because of how powerful the bomb shuffle effects are. So why not have a single minion that could make one or more copies of battlecry minions like Clockwork Goblin and Seaforium Bomber? Could potentially get me a Blastmaster in hand again without taking the first one off the board. Will require testing, but I think she'll work in the deck.
My two big crafts are likely going to be Scargil and Madame Lazul. As far as epics, I'll probably craft Witch's Brew if I don't pull 2 copies from packs on the first day, but I'm going to try to limit my crafting in the first week or so. I'm F2P, so I have to be conservative with my dust.