Infernai said:
However, i had no clue about the romance sub-plots...umm, is there anyway to avoid it or is that kind of a no-go?
AppleShrapnel is right that it's a motivational plot device, but it's less about anyone's feelings than about how you define your character by her or his actions in a given situation. You can't avoid it, but you don't have to see it as some kind of OTP if you prefer to think of your character as independent.
Regarding your character's build, I know you've decided, but keep in mind for future playthroughs that the character's size and weight will affect how he/she handles. Give an 80-lb runt a huge two-hander if you like, but you'll have to learn how to fight around the physical awkwardness it will cause. It can be done--and it's often entertaining--but it will probably slow your story progression a bit. Age is less of a game-changer, but you still have to spend many hours (and cutscenes) looking at what you make. I'm thinking of making a spry old crone (strider/ranger) at some point, but it will mean avoiding some quest lines because, um, ew.
PS--Nier is awesome! Glad you tried it.