One more thing :
Diana Kennedy is features w a cooking Shrimp article and guacamole. im a fan of DK, therefore :
I don't use garlic , but I do use lime.
I love lime , as i have a tart tooth rather than a sweet tooth.
I use lime over lemon frequently
I also understand that lime has a very powerful flavor and ' might ' over power subtle flavors
so the next Guac I make Ill try it W/O its difficult for me however to get serranos w good heat.
and Ive always used the seeds