That's a bit of a wide question I know, and one never really stops growing... so what bands/artists do you grow up with till today? Which of them have really represented something for you?
As for me:
I was I think 8 or 9 when I was stricken by the Queen, it was really love at first sight (or hearing in this case ) and as of today I still love them and often listen to them (my daughter really likes them, so we often listen to them in the car). As I grew up I moved more into 60's and 70's rock: first band who did catch me on that panorama was the Led Zeppelin (of course), soon coupled by the Deep Purple. From there I actually moved backward rather than forward, and ended up being engaged with the Beatles (in my 15s less or more) and Elvis and Hendrix soon after.
By the time I was 18 or so, I met the band that really switched my musical tastes towards something harder, the Black Sabbath. Both because of music and lyrics this has been my main band, hands down. Following up I slowly slipped into the 70's and 80's harder rock and metal, with bands like Iron Maiden, AC/DC, Motorhead, Van Halen, etc). About the same period I started to listen to Metallica, Megadeth, Guns&Roses, Manowar (not very much back then), and the like. Nirvana have a special place in this period, and I still have moments that I dedicate to them exclusively. Around my 30s I moved into more modern bands, such as the System of a Down, the LimpBizkit or the Korn.
Last finding of my 35 years old career of rock fan are the Tool, really a band which is perfect for my maturity.