Real Estate Contract

[Alex Wong]

I have a question about real estate contract in general. From my understanding, there are mainly two ways to get out of a contract. Home Inspection and home appraisal. I am asking mostly for the scenario when I have buyer remorse after making an offer (offered too much) 

If I want to use home inspection to get out of a contract, I can use an inspection notice. 

1. What if the inspection comes out mostly clean, can I make up reasons to get myself out? Or does it have to be structurally/mechanically related or legitimate? 

2. However, if the seller agrees to fix everything, can I still elect to void the contract? What happens if the seller agrees to fix everything important but leaves one unfixed?

In terms of home appraisal, what if the appraised value comes out to be lower but the seller agrees to the full price reduction? Can I still choose not to accept his ? 

Also, I would like to know what some of the common contingencies/addendum I can put down to help me back out of a contract. 

Thanks,