Hehe, Athena, Perseus and Nemesis were my first microcontrollers! Why? because the basic language was available for free compared to the Pbasic that I had to buy to be able to program the PICs and also they have a bootloader so there was no need for an expensive hardware programmer. True, the price per chip was rather expensive at $13 for the Nemesis, but I was saving about $200. For a project or two it seemed a more reasonable choice. Dios and DiosPro are more powerful and suitable for advanced applications. They are good micros for beginners that don't want to shed the big bucks for a BasicStamp, however, I think they are a bit obsolete. Out of everything on the market, I would say Arduino is the best choice for beginners or even advanced users.