I think one should train because one enjoys it btw, i was once around 275 pounds and fairly lean and women seem just as much interested in me as their are now with me weighing in around 215, i am around 5' 9'' for a guide. Also i use to work as a lifeguard so talked to many woman and most said they liked a bit of muscle but not to much on guys, but also most were the sporty types, i think ones that are not are indifferent and dont care for it much.
Although some i have though had no interest sometimes stare when i am not looking, so i believe a fair few are secretly fascinated by it because a good physique is a fairly rare thing, so could be envious abit but stick to what they feel more comfortable with and use to more in guys.
But to finish a nice personallity is most important for many woman i think, but strange some seem to warm better if you not to nice a sort of challenge to them i suppose to try and tame one like we all like something we cannot acheive that easily.