My favourite is the Mocha (with soy).
This location is super tiny, but it's conveniently really close to my work. Jimmy's Coffee really shines in an area that is over-saturated with coffee shops and cafes. But what I really like about them is their mocha. Compared to other places:
1. It isn't overly sweet. The amount of sweetness is perfect! I usually have to ask most places to use less syrup or sweetener.
2. YOU CAN TASTE THE COFFEE. I ask for double espresso (they give you an option as to single or double), but it's extremely rich and full of flavour.
3. There's a hint of dark cocoa that makes it extremely unique. The only way I can describe it is that it tastes like the dust on top of truffles.
Funny enough I haven't had their coffee, but I love the mocha so much I always order it even though I come in with the intention of trying something new :P
P.S. This is more of a grab-and-go kind of place. It tends to get cramped, especially when there are a lot of people lining up so if you are looking for a chill place to sit down and chat, this might not be for you.