Analog delay pedals and the question of character

That pushback quality is exactly it. The decay behavior shapes everything, like whether the repeat lingers or dissolves completely changes what you naturally reach for next. The ones with slight unpredictability feel more like conversation partners than tools. They pull you into listening instead of just setting parameters and forgetting about it.

The input impedance angle you mention seems underexplored in most pedal discussions. A circuit that actually responds to pick dynamics and volume control creates genuine feedback about what's playable, whereas one that compresses everything to a fixed state just colors the signal. In jazz especially, that responsiveness becomes part of the ensemble conversation, shaping what adjustments feel natural versus forced. The reverb and delay distinction might hinge on whether the effect integrates as deliberate vocabulary or functions as ambient infrastructure. Gear that becomes part of your phrasing rather than sitting in the mix probably treats your playing as continuous input.