If you're standing in line to get the best to-go ordered taco in the City, you're probably at Agua Verde http://www.aguaverde.com/. It's popular, it's a bit cramped inside, and the location is a little off the beaten path, but it is enticing, it's relatively quiet outside, and a great location if you're at the UW Med center or the University. People rave about the flavors and they're right, but it does cost a little bit more and if you just want a cheap place to eat, you probably won't like it. When you go, expect to wait in line for at least five or ten minutes, because it is good. They apparently rent kayaks too -- I have not, so cannot comment on that, other than to say a burrito on the lake sounds nice.