I think I know most songs only from the radio, but I think my mother was also a fan of the band

Yep. That was my first contact with the band. My mom had the cassette tape. I think my favorite song would be Raise Your Hand. That's... probably, their heavier song, like, ever.
(aaaand it was also "featured" in the movie Spaceballs :3)

https://www.youtube.com/watch?v=yN2n5M-2JbE

Some nice songs on that album

Slippery when wet
(that's a Bon Jovi's album title, btw)