Dont worry, I wasnt suggesting that you were one of the fans itching with anticipation for Frank and Elektra to get it on, I was simply commenting that they exist and that I find the preoccupation with it a little uncomfortable.
I agree with you on the 'Frank as adrenaline junky' thing. That is equally off putting in its own way as the suggestion that Frank might generate genuine feelings for any female other than Maria.
As for the Avengers thing, I expect that will simply be white-washed the same way it always have - that either Frank goes back underground or that the Avengers will once again be engaged with bigger things.
To be honest though, I can almost see Elektra as a romantic match for Frank. Both are killing machines and Frank....well Frank lives for the kill there is no doubt about that, adrenaline junkie not withstanding.
From a tactical standpoint, I could almost see Frank feeling that one day he will truly be dead, no blood stones, no agents of heaven, and NO Frankencastle. Perhaps, just perhaps he may come to feel that he would need heirs to keep the war going. Between Elektra and Frank, those would be some very dangerous heirs to the name: PUNISHER.