The generally agreed upon positive affects are listed within the IPCC report. The validity of the concept of man induced global warming is not part of this question so it is ignored. Increased CO2 is...
Some countries will benefit. For example, the heating could cause some Crops to evolve, and new ones to grow. Also, because it will get warmer in some countires, they would get more tourist, which...
Canada & Russia.
That's two places, the others would probably be northern Sweden, Norway, and Finland. Would the benefit to those places outweigh the pain that is in store for the rest of us?
Well in some countries it may make it warmer and people in this certain area would appreciate it. But on the down side ice caps are melting and countries are flooding.