Starting on one kick...

choke on cold start. how is your throttle responce under 1/4th throttle?

uif you leave you petrol on then its probably flooding a little...
try turning it off after diign then back on on your next ride

good compression, good reeds on a two stroke ,valves in a four troke, proper timing, and good carberation.

good compression, if the rings are sealing well, everytime the piston draws its air from the carb it will have a better signal inside the carb compared to worn.

good reeds/valves, everytime the piston changes direction inside the engine you are trying to force the air backwards thru the carb.

good timing, if the timing is too far advanced the combustion chamber is trying to light before the piston is close enough to top dead center at kicking speed. Engine is going to try and run backwards, backfiring, sore ankle.

good carberation, float level, needle and seat, pilot jet size and choke working well.

two strokes,try this when cold, turn fuel on, choke on , no throttle, gently kick thru the starter 2,3 times and then give a good kick, possibley a small blip of the throttle as it catches. If you are giving quite a bit of throttle at starting you are lessening the effect the choke knob has in your carb. If this technique makes your bike start up easily the cylinder is out of fuel/ air and you are just priming the system.Not going to get much better than this. If the idea of starting first kick is still bothering you turn fuel on, choke knob up, lean bike over till fuel dribbles out of overflow hoses, put it in a higher gear and rock the bike a little, go back in nuetral, then kick, but you are doing he same thing as gently kicking thru those easy 2,3 times as stated before.

four strokes when cold ,fuel on, choke up, a twist of the throttle before you start kicking, 2,3 kicks to find topdead center, just slightly inch past top dead center, let kickstarter come all the way back up, hand completely off throttle,then kick.
If the bikes starts easier cold then warm , possibly the jetting is too rich.

I don't believe every bike out there starts "first kick" I just think noone counts the " preparation" before they really put their foot into it.