I've become a great fan of CleanShot to quickly grab screenshots or small videos. I love the annotation tools and some of the small features when capturing video.
Something I would love for CleanShot to add are simple "highlight" tools, especially when editing video. For example, I would love it if I could record a video of me using some product and then edit it so that I can add a nice zoom-in at some point to highlight me doing something, then zoom back out, etc.
I currently do those kinds of videos with CleanShot + ScreenFlow (or just ScreenFlow), but I feel it could be a lot simpler and I trust CleanShot would do a great job with the UX of that.