Do I need to make reservations for these WDW restaurants?

So I’m going to Walt Disney World May 19-24th (week leading into Memorial Day Weekend). Anyway, I already have made my reservation for V&As (gf and I are psyched about it). However, we are debating making reservations for other dining places in WDW while we are there. Obviously it’s a must (and in most cases is already booked) for character dining and dinner shows.

But what about other casual dining or signature dining places. Places we were thinking about were: Tony’s town square, Jiko, Teppan Edo, Kona Cafe. The main thing is we do have a tentative plan for where we are gonna be each day, but we still want some relative freedom in our plans (what if our reservation comes up and we aren’t at that park, or we wanted to stay somewhere longer, or just aren’t even hungry).

But yeah so for other dining places in WDW that is not character dining, V&As, or dinner shows do i still really need to make reservations?

~G