I don't think there can ever be a right or wrong answer really.
Just as babies don't come with a manual, neither do parents.
You're as likely to be able to 'predict' what type of baby you'll have as you are about what type of parent you would be. And, of course, as babies and parents 'grow' ,'develop' and 'mature', no-one can predict what their 'future selves' could/ would be like either.
It's all just a bit of a gamble basically, as are almost everything in life.
You can't truly predict what the results of any of life's gambles will be, you just try to make an educated guess, don't you ?
Will this partner truly love me forever? (No way to tell really, until one of you actually dies
)
Will this partner make the best husband ? (we all think so before tying the knot, don't we ?)
Will this partner be a good parent ? (we hope so, based on our feelings etc)
Will my baby be smart ? (again, we can hope so, but no guarantees)
Will my baby be like me ? (It's a crap shoot. No-one knows)
Will I have an 'easy' baby ? (no way to tell. You could have a text book baby, or a have nightmare time with colic/ illness/ allergies/ disabilities etc)
Life is just one big gamble. You can only be true to yourself and what's important to you, and allow your partner to do the same.
But, in the end, there's no guaranteed 'happy ending' for anyone. We just make the best with what we've got, and try to find the joy in every day.