I decided to start going to the gym more just to take care of myself and to keep myself in shape. Attraction from women is considered to be just a bonus, what parts do you ladies think I should concentrate on? Chest, shoulders, back, arms, etc.
To be honest, the part of the male body that can get us most physically aroused is the lips and tongue, in my opinion ;) I know you're asking about how to make yourself "look" hotter though. To me personally, as long as a guy's gut isn't hanging out or his body isn't totally disproportionate I'm happy. Focus on the areas YOU want to look good. If a guy has a sexy toned back, I'm happy. If his strength is his washboard abs, I'm happy. If he has totally ripped arms, I'm happy. If he has none of the above but isn't overweight or pudgy, I'm happy. lol
Man, I just learned that girls are sometimes as shallow as men can be, I'm in the same situation and a close female friend told me to get rid of the belly, and that's it pretty much. Also dress with more style, that improves your attraction in the process of working out, it takes a lot of time but good style gets you way ahead.