You use ' dare I say it ' when you know that what you are going to say will disappoint or annoy someone.
I'm sorry to say
You use the expression I'm sorry to say to express regret together with disappointment or disapproval .
I wouldn't say no
You use ' I wouldn't say no ' to indicate that you would like something, especially something that has just been offered to you.
I daresay/I dare say
You can use ' I daresay ' or ' I dare say ' before or after a statement to indicate that you believe it is probably true .
I dare say/I daresay
You can use ' I dare say ' or ' I daresay ' before or after a statement to indicate that you believe it is probably true .
I am bound to say
You can say ' I am bound to say ' to introduce a statement expressing something that you find undesirable or unexpected .
shall I say shall we say
You use shall I say and shall we say in order to warn someone that what you are about to say may cause offence or be surprising .
though I say it myself/though I say so myself
You can say though I say so myself or even though I say it myself when you are praising yourself or something you have done , but do not want to sound too proud .