How about this killy
You get an item in diablo 3 but would rather have a different color for that equipment. Is it worth 10 cents to you?
Nobody wants half-made games. But I think a lot of gamers would like 110% of the games they buy. There are some things that are beyond question though. Don't offer overpowered weapons as DLC. Don't offer advantages over others with DLC. DLC should be made to complement a game and improve the enjoyment of it.
Microtransactions is a great way to accomplish both of those goals (improved gameplay and finances)









