Should you enter into a relationship with someone who is genuinely nice and would treat you well, even if you don't find them physically attractive?
Personally, I'd say yes. I have good reasoning for that too. Physical attraction is fairly important in most relationships and a lot of the time you start talking to someone based off of liking what you see physically. Now, let's assume you start dating this person who you don't find attractive, the longer you get to know them & the more attractive their personality becomes, oddly enough the more attractive they start to become physically to you.
For me everyone starts off neutral. I don't know why but there's no "attractive meter" in my head when we first meet. Now, if this person turns out to be horrible - they start becoming ugly and it's the same in the opposite way. If they're great, they'll become attractive. I think that's how you can say "you're just more beautiful to me everyday"..attractiveness grows with love.