you're at the heart of the problem for handgun permits in NYS. It is incredibly arbitrary, with the rules changing from county to county. Hopefully there is someone on the board or someone you know that has successfully applied in Niagara county.
Personal protection, target and hunting are good reasons.
My experience is that asking for personal protection will not harm your application, but not asking for it means you won't get it. Most of the time. I got lucky.
I was fortunate enough to get a very sympathetic county police officer in Monroe county doing my phone interview. I hadn't stated personal protection, as at the time, I wasn't sure I really wanted to carry. I explained why I was getting the permit, and he actually amended my application, and apparently recommended I get a full carry license, because that was what I ended up with.
Keep all your answers simple and short, but be sure to be completely honest. Any inconsistencies will lead to suspicion. Any omissions of convictions will definitely get your application denied.
Good luck. My understanding is Niagara county is one of the better places to apply.