I haven't heard every Motorhead album because to me they are a bit formulatic. If I had to pick one, it would be Orgasmatron. I always thought the lyrics on that song were brilliant.
I loved the energy on Bastards so that's up there on my list as well.
March or Die was tainted by the duet with Ozzy, imo.
I can't remember one song off of Snake Bite Love as I sit here. I may have to listen to it later.
As for AC/DC, I can hear them everywhere so I never bothered to purchase more than a couple of their albums, Highway to Hell and Back In Black being two of them, of course. Ballbreaker was highly underrated.