Some of things I would really HATE to see sold:
-gold, any items, armors, minipets, heroes, missions...
-anything that gives advantage over people that dont buy it (like suggested in this forums increasing hero limit in party),
-anything that can affect ingame economy (like any bonus item packs further decrease the demand for items that drop ingame),
-overpriced small content packages (like the 'bonus' mission pack, which shouldn't exist at this form)
- scam-packs which get sold as something unknown, then stop being sold after revealing what it really is (same infamous example)
What I'd like to see:
-a big comprehensive content package worth its price! Something that can be called a complete product. Something like a future expansion, Guild Wars Expansion-2, including 9 new dungeons, 50 new skills, 20 new armors, etc. sold for ~20$ - if the amount of content is half of a full expansion it should cost half the price, the price should be proportional to the amount of content included.
-make an Auction House (yay!) with full buying functionality and very limited selling ability (like a limit 1-2 items at once) free for everyone, and sell a Power Trader Package in the store, enabling extra features for sellers and greatly increasing the limit of items sold. I would certainly buy that!
-ability to rename a character or change appearance (no new exclusive looks though)
-ability to move a character into your another account
OK, a little thread necromancy here, but seeing as the store is still kinda "empty" some new ideas can never hurt.
Here is my idea (to add to all the other ones already mentioned in the thread)
Mini pets fashioned after different endangered species! (customized to the spawning account, could also be unaddable to HoM). Things like mini-tigers, mini-polar bears, mini-white creasted eagles etc. And yes, mini-pandas. They could have their own color text (blue?).
Part of the proceedings shared with the WWF.
I think this would be a product many would like to buy (I know I would), that would give Anet good-will, and would help protect endangered species.
I know that there is the argument that why choose one charity above all others, but: Endangered mini pets make sense, use a mechanic already in the game, and do not give in-game advantages. And to save endangered animals can hardly be interpreted as pushing a political agenda, or to be relevant only for one specific part of the world.
Stuffed charr plushy? Asura coffee mug? Perhaps semi-transparent ghostly slippers? Or a purple T-shirt that says "Typical whammo gets the phat loot and all I get is this req 13 grape T-shirt" lol... (no offense intended for W/Mo's)