It was tough to choose between intuition/feel and just 'don't build encounters.' Because I really don't pre-build encounters in 5e, it's not worth it. The game happens at the table, the guidelines are significantly more trouble than 3e or 4e and barely deliver results as dependable as 3e, and the PC's performances are variable enough (I typically don't run for a consistent group, but for strangers, or for an open-entry/exit public event where I may know most of the players and have regulars, but can never be sure which of them will miss a session) that it's just not worth it. Instead, I improvise the encounter, and sometimes the monster stats, at the moment the PCs come upon it. Then I'll tweak it as I go. So it's very much a matter of DM experience, intuition & feel, but it's just not prepared/built, it's in the moment.