I log the interesting traffic... So for starters I want to know what my IOT stuff is doing.. So I log their vlans for outbound traffic.
On the wan - yeah it can be noisy.. But I do like to see directed unsolicited traffic, so I log just that SYN's to my wan IP.. Its more just curiosity sort of thing... Like for example when all those routers got taken offline like a million of them in DE alone shitton of noise being seen on 7547.. Yeah I was seeing that as well ;)
Your typical noise ports are the common 22, 23, 3389, 1433, etc.. All well known script/bot traffic looking for shit to exploit.. Its noise - but it is interesting to see how much of it gets dropped..