Love a good falafel from Mahmoun's and their hot sauce is fantastic. They've expanded out of the city in recent years (New Brunswick, Princeton, New Haven) and I wouldn't be surprised if they kept on going so some of you guys might get lucky one day.
I lived on falafel and shawarma back when I spent a couple weeks working in London, thanks to the rest of their food being so ####ty in general. A great middle eastern community though.
While falafel is great on its own, all those veggies you throw on top can really elevate it. Love anything pickled with it.