Nangang is close to work, but somewhat out of the way when you go out for some drinks or want to go to a more western restaurant.
If you want green, I would highly suggest Neihu. Especially the stretch between Bihu and Dahu areas. It might be a 10-15 minute walk to the MRT stations if you live farther out from the MRT, but it’ll definitely be much more comfortable neighborhood to live in.
I was looking at apartments near the Qingbai Park 清白公園 near Neihu MRT and that place is pretty nice. You won’t have to worry about too much congestion on the weekends since the roads there are wide and some even double yellow line two way traffic.
I will mention one thing about commuting via MRT on the Wenhu/brown line. It gets heavily congested since the compartments are the smallest and the line does cover a pretty long route! Nonetheless, if you were commuting from Neihu/Dahu down to Nangang Software park, it doesn’t get that crazy since most people would be headed towards Gangqian and Xihu since that’s where Neihu Software Park is.