Is 178 pounds good weight for a relatively active 31 year old male?

Sounds about right, but then again it depends on your frame and muscle mass.

Best wishes

if you train and eat right and well you can even get healthier, some people if they want to get better metabolism is to use exactly what's on my link (below). with a good metabolism, everything gets better in my opinion :)

http://healthymotivationtips.site/weightloss

I think it is an excellent weight. Lean body mass ratio is more important than weight.

Sounds like a good weight to me.

you need to ask yourself are you happy with it not us

I work out 4 days a week. 5 if i have the time.