I had no idea pesto was so easy to make until I tried last week. It was so delicious that we decided to make it again today. We bought the basil and garlic from the farmer's market this morning. I bought 3 types of garlic from a stand that had about 10 varieties. For the pesto, I used some garlic that was advertised as being good raw and in salads. This garlic was strong; it burned under my fingernails when I scratched off some of the skin.
There's no "right" ratio of ingredients for pesto; you do what tastes good. Erinne and I like extra garlic. I look forward to experimenting with the ratio of garlic and basil.