From my perspective...
B2In my opinion...
I contend that...
B2I strongly believe...
In my view...
B2According to my opinion...
I believe that...
B2My belief is...
It's my understanding that...
B2As far as I know...
To my mind...
B2In my opinion...
I'd suggest that...
B2I propose that...
It's my opinion that...
B2I think...
As far as I can tell...
B2Based on my knowledge...
I have a feeling that...
B2I suspect that...
I'd say that...
B2My assessment is...
It appears to me that...
B2It seems to me that...
I'm of the opinion that...
B2I think...
I reckon...
B2I think...
I suspect...
B2I have a feeling...
I'm pretty sure...
B2I'm almost certain...
I'd hazard a guess that...
B2I would guess that...
My guess is...
B2I think...
I gather that...
B2I understand that...
I'd bet that...
B2I'm confident that...
I take the view that...
B2My opinion is...
It's safe to say that...
B2It's likely that...
It's a moot point.
C1The point is irrelevant or no longer matters.
I'm inclined to agree.
C1I tend to agree with you.