So what 3rd party apps are you guys using? Outside of Mint and Fidelity, they all kinda blow.
Dark Sky is neat if you live somewhere where the weather is unpredictable enough to warrant being notified of changes. It taps your wrist ten minutes before precipitation, and is also just a pretty standard weather app. I've also been using Wunderlist, Workflow, AeroPress Timer, Yummly, Knock, and Yahoo weather.
Wunderlist is a bit slow, like ever third party app so far, but it does what it says on the tin and I was already invested in their stuff; Literally just a way to check my list without pulling my phone out. It has some really nice animations, but other than that it's fairly standard.
Workflow has the potential to be amazing, but it crashes constantly on my iPhone 5 even before I owned a Watch. Standard flowchart type automation that can be amazing, and it really opens up what your watch can do. The one time I successfully used it I ran the tutorial recipe that let me select a series of photos, turn them into a GIF, and post it to Facebook. All of the recipes can be launched and used from your Watch, which means you suddenly can do almost anything exclusively on your Watch.
AeroPress Timer is basically what it sounds like and obviously useless if you don't drink coffee and occasionally use an AeroPress to make it. There's a pretty large selection of recipes, and it goes through each step with a timer automatically after you select one.