I've done several sets of long-form, open-ended user interviews. My job here is to discover what's really going on in people's lives. I lean qualitative; I don't really do surveys, except as screening tools for further interviews.
Interviews are only as useful as the actionable insights they help you find. It takes me at least two hours to unpack a one-hour interview. Honestly, this unpacking and discussing process is my superpower. I can still describe to you how people I interviewed a year ago would use any given product.
Time to figure out how this thing should actually work. My wireframing tools of choice are pen, paper, scissors, glue stick, tupperware, Post-its, kraft paper, printer paper, colored markers, doors, walls, windows, and other people.
When that's too low-res, I like to wireframe in Sketch, but I'm fluent in Omnigraffle, Balsamiq, and Illustrator.
Wireframes are tools for explaining, not testing. To test ideas, I hand-code prototypes in HTML/CSS/JS.
(If that seems like overkill, you try using a friendly drag-and-drop tool to mock up all the cases and interactions in a multi-screen document management app.)
Don't get me wrong, I love the flavor-of-the-month tools for their speediness and gloss. Invision is a particular favorite for early designs. But when I have an idea for a funky interaction I need to think through and user-test, in jQuery I trust.
I work at Sliced Bread Design, an agency in Mountain View, CA, USA. I have worked on products in health, education, and finance.
Most of my work is under NDA, so I can't post it here. Email me at email@example.com to request a portfolio.