I am considering SpeedPlays for my road bike and am torn between the zero pedal, and light action.

The light action pedal states that it is not for agressive riding, but very easy in and out. What does 'agressive' mean in this case I wonder? Standing on sprints and climbs? I assume agressive runs the risk of unintentional release.

I have a mtb pedal that came with my Giant OCR1 now. Shimano M505, double sided, and multi-release spd cleats. I had single release once, and not being used to them, caused a crash (only one way out). Plus I felt really locked in with my knee. Old pains there, not good. Thus, another draw to SpeedPlays for float.

Lastly, I saw the X pedal has even greater float than the light action or zero (15degree there)... like 20+ degree for the X. The SPD comparison is about 6degrees. Think mine must be more with multirelease cleats??? ...sometimes I do have that feeling that I might unclip standing, but am just careful not to twist too hard. Knocking through cyber wood, never yet anyway.

Any advice on the choices?

Thanks!
Miranda