As long as he is not greatly overweight and obese, I am perfectly fine.
If I did end up falling for a man like that... I would do all that I could to get him to exercise with me, for his health. I cannot imagine the pain that would light if our life together was cut prematurely, and over an issue that could have likely been solved.
Ideally? I prefer a slight tummy, and typically "stockier" build. I do not know why... but I just find it to be the cutest thing.
Muscle is not bad, either-- though I confess that it would depend, as some are fairly narcissistic and obsessive with it.
Being toned is probably better than having mammoth muscles; the above would (more or less) be radically bypassed.
Beyond that... I have no care. Just as long as he is taking care of himself, his body-weight and structure does not bother me.
If you are not flabby.. with a jelly belly and a big butt , you are good to go :) Muscles are definitely a bonus .. my boyfriend is a muscular guy, though I would have loved him equally if he wasn't so it doesn't make any difference to me :) .. it also depends on the size of the girl you are walking with .. if she is too petite , you'll look weird :D
It's not hugely important I guess. I prefer guys that are quite muscular. Not like body builders but just big and broad. I don't really go for skinny guys and I don't mind if they're a little chubby. Your weight seems perfectly fine to me :)