What is the best microcontroller?

What is the best microcontroller?
A similar question would be, what is the best car? Well that depends on a lot! Microcontrollers have many different features. Some features you may need, others you won't, depending on what your robot does. If you don't know what features you plan to use, its really hard to answer this question. There are several points you need to consider. For example, is there a lot of source code already available on the web, or does hardly anyone use that particular microcontroller type? How much are you willing to pay? Is there a power bus on it, or do you need to do extra wiring? Does it have a built in programmer or do you need to buy one separately? Then you also need to consider the brand, the most common being PIC and AVR. I 'grew up' using PIC's, as they are (were?) really popular and have tons of available code. But compiling software for PIC's range in the $100's. I have since moved to AVR, as compiling software is free, the hardware is better, and they are starting to become really popular