There's no question about it for me, it's got to be Nigeria!!! Honestly I can't even see myself being with anyone that isn't from my home country and that's because us Nigerians are a very lovable but odd bunch and understanding is and our core values is quite difficult, especially Nigerians like me who reject alot of typical Nigerian beliefs but still uphold alot of Nigerian values.
I honestly can't see any other woman from any other country understanding how things work in Nigerian culture and I'm not really ok with the idea of having to adjust myself to someone else's culture or make them adjust to mine, it just seems like too much work for me.
Nigeria has 250 ethnic groups which are all pretty different from each other and there are some of them which are vastly different and even me that's a Nigerian wouldn't even dream of going near some of them when I'm looking for a wife. The thought of finding a partner from elsewhere in the world just doesn't appeal to me at all. I love Nigerian women, and to me they're the best in the world.
I hope this helps.
of course I will choose the life partner in my own country because it is easier and very close