unless you're a natural brunette and your hair is dyed blonde in the pic you really shouldn't do a brown to blonde ombre since it'll look weirdly colorblocked when it starts to grow back in, & will take a lot lot lot more upkeep. I suggest trying to look for styles that go from your blonde to a lighter blonde, better for summer too!!!
I've even seen blonde to brown ombre's that are really cool and unique seeming (at least where I'm from they're not nearly as common). they seem a bit tougher to pull off but if you think you can i think it'd look great. there are lots of examples on pinterest, some much better than others obvs. I would attach links but apparently I'm not allowed to lol
No. None of these ombre will suit you at all. Base on your other tinypic pics, brown seems to just block off your natural light and beauty. Even if there's some blonde into the mixture of brown to create that ombre effect, it will distract from your facial beauty. Isn't your hair suppose to bring out your features? This won't do it for you
Personally your blonde hair suits you just fine. If you're bored with your hair, I say you can look for a creative cut or something.