Where do you spend your time building applications?

Hi Developers! As part of an internal company hackathon at InterSystems, I'd love community feedback on a few topics. Feel free to chime on any/all of these via comment or direct message to me.

1. If you were to launch a new application/project, what problems would you need to solve right off the bat? What technologies would you use? Why?
2. What are the most common and repeated problems that you find yourself solving?
3. Where in InterSystems' technologies do you spend most of your time?
4. In a solution you have recently implemented, how were your time/efforts allocated? (e.g., across UI, database, APIs, integration, deployment...)

Thank you!