Caveat first of all – I have virtually non-existent technical skills.
26″
Presta
Turn bike upside down
SPDs
I would like to try a dropper but my bike has a 27.2mm seat tube and 1. I’m not changing it and 2. I’m not aware that anyone makes a reliable and affordable dropper in that size (happy to be corrected of course).
Without a dropper I just cannot get on with dropping my seatpost as I find I cannot get my feet in the clips for some reason owing to feet / brain interface malfunction, and then cannot pedal through anything so just end up flailing hopelessly before stopping on the first large obstacle.
I have nothing more to add.