I love fresh citrus juice — lime and lemon in particular — in various recipes. They add fresh flavor to marinades, dressings and sauces.
Now, I have a new reason to love citrus: Juicing the citrus is a fabulous way to involve the kiddo in cooking. Mine is still too young to have the strength (or accuracy) to be left to his own devices to juice a lemon. But with some mama supervision, he has a fantastic time. I presume as he gets older, he'll be able to be progressively more helpful.