It shouldn't make any difference from an 'Advert Relevance' perspective (as far as I know), so I guess it would depend on whether you want to write different adverts for the different match types. Can't think of any other differences...
In order to create a high perforimng campaign, you need to create a tightly targeted ad group with small amount of relevent keyword in each, 25 unique keyword per ad group will be great, plus broad,phrase and exact keyword, it will be around 75 keyword, this will lower your cost per click, and get a higer page rank.
Grouping as specific as possible lets you create a laser targeted ad, enhances your relevancy and keeps Google happy!
No it won't, though if you set them up by hand, it may give you RSI. I think GFC's attachment shows that it's possible, and basic logic suggests that, if you've got sufficient traffic on a keyword, you should give it it's own advert text...
blastboy :1 keywod per 1 ad group will kill you. maybe blastboy mean it will raise a lot of your budget.. thank you guys, your opinion very helpfull.. I'm new .. so if you have unlimited budget; (this is my conclusion) do what you have to do to get target audience and landing page, using abroad, exact or frase match.. depend on the situation. right?