Hi Philly,
I admit that I chose the examples semi-randomly, and looking into them more carefully I realize that they are slightly atypical, and, strictly speaking, #3 (
f I answer that question honestly I would rather be across the street) conveys the meaning of
if I answer that question honestly [I will say that]
i would rather be across the street
Perhaps a more characteristic example would be:
If I have to choose between these solutions I would prefer...
In my opinion, whenever "would" is used in these cases, it's mostly connected with volition. Thus, many mixed conditionals can be formed in ways that would be considered "ungrammatical" by the idiotic grammar methods/books that talk of the 3 conditionals, disregarding cases such as:
If you would send me the details, I would be grateful
How can I talk to him, if he doesn't/won't listen (=refuses to)
I'd be happy to hear your suggestions 