Between the three most popular citrus varieties, Meyer, Eureka, and Lisbon, Lisbon definitely is my favorite in terms of flavor and juice. Lisbon is the most common standard variety you will find sold in a supermarket.
However, everyone has their own personal favorites. Many prefer Meyer because it is a bit sweeter and has milder flavor with less sourness. Eureka is a slightly bigger fruit size and has a little rougher texture on the peel.
Ponderosa lemons can get huge sized fruits, are very ornamental, and the trees are also prolific and very fruitful, but it is not known for having the best flavor.
Meyer and Ponderosa might be considered by some to not really be "true lemons" in the sense that the others are. Meyer is believed to be a citron x mandarin hybrid, while Ponderosa is believed to be a citron x pomelo hybrid. Regular lemons originated in Italy around the 1500s and were hybrids between citron and sour orange.