Como começar uma frase (expressando preferencia ou opinião)

Opinions, Preferences:

I think..., 

In my opinion..., 

I'd like to..., 

I'd rather..., 

I'd prefer..., 

The way I see it..., 

As far as I'm concerned..., 

If it were up to me..., 

I suppose..., 

I suspect that..., 

I'm pretty sure that..., 

It is fairly certain that..., 

I'm convinced that..., 

I honestly feel that, 

I strongly believe that..., 

Without a doubt,...