conditional form

[Alexander216]

is the following clause sound?

I didn't have a long term plan five years ago. but seems like if I had had one, I may not have been more satisfied than I could be today.

I want to emphasize that long term plan is not working for me. and can I replace "may" with "could" ?

[5jj]

is the following clause sound?

I didn't have a long term plan five years ago. but seems like if I had had one, I may not have been more satisfied than I could be today.

I want to emphasize that long term plan is not working for me. and can I replace "may" with "could" ?

You say that the long-term plan is not working for you, but your example sentence suggests that you didn't have one.

Before we can work on your sentence, we need to know:

Did you have a long-term plan five years ago?
If 'yes', are you more or less satisfied now than you would be with no plan?
If 'no', are you more or less satisfied than with a plan?

[Alexander216]

Sorry for the ambiguous I made.
I didn't have a long term plan.
I am less satisfied with a plan. It turned out to be great with out having a long term plan.

[5jj]

"I would not have been" simply presents the hypothetical situation.
"I could not have been..." is roughly equivalent to "It would not have been possible for me to be..."
"I might not have been" presents a less likely hypothetical situation than "would".
"may" is technically unacceptable in this sentence.

[Alexander216]

Thank you very much.

I am wondering what are the omitted words for :
"I could not have been more satisfied." ?
are they
"I could not have been more satisfied than the actually, real situation I had experienced"
does it means that no possible situations can be happier than it turned out???
so I am suggeting that the real situation is the one I feel most satisfied.

I could not have been more satisfied than I am today.
again, I feel most satisfied today.
Did I make the sound interpreting?

however, as I want to emphasize the current impact, I want to compare two situations where one has no long term plan and one has. I don't want to tell what I feel during the five years. I just want to show what they result in today's feeling.
so instead the one I mentioned in the first line. should I use????????:

I didn't have a long term plan five years ago. but it seems as though if I had had one, I could not be more satisfied than I am today.