For anyone having hard starting issues check out this youtube video to see if your fuel pressure regulator is leaking past the internal seal and "flooding the engine" during restarts.

I've had this issue continuing to get worst for almost 3 years. It started as seeming like a hot restart issue then became a hard start no matter what condition (sometimes up to 10 seconds of cranking). In trying to diagonse the issue I adjusted valve clearance, replaced spark plugs and fuel pump, cleaned MAP, cleaned IACV, tested and cleaned fuel injectors, and swapped ignition coils. Probably even more stuff I am forgetting. I even tested fuel pressure with special Honda gauge and it passed the FSM tests and held fuel pressure very constant when primed which lead me away from the FPR. I happend to stumble across the video below in my deseparate search to find a solution. I'm so thankful I did because now my car starts perfectly and it was such a simple fix.

BTW, for anyone looking to replace their FPR I bought GP Sorensen P/N 800-483 with free overnight shipping with 20% off from a well known auto parts store and it was the exact same as OEM. Made in Japan same casting marks on the body etc.