As a young person starting to explore myself, I was focused only on the penis shaft. Your basic wanking handjob without any "frills". Once I began dating the girl who would become my wife, she "introduced" me to ball play as she'd spend time playing with my balls while stroking or sucking me.
As I've gotten older, I now play with my balls, especially as the sack tightens. I find the sensation of lightly touching them as they are contracted to be very arousing.
I also use lube to masturbate as often as I can The ease it adds to sliding my hand up-and-down my cock is intensely pleasurable.
As I retired 12 years ago, I began to edge my cock - something I never did previously. Most days now I'll edge my cock on-and-off about 2 hours daily while catching up on news, drinking my morning coffee, reading/watching porn. I really enjoy the feeling the wetness of precum on my penis slit.
I've added some masturbation toys (HeadHoncho and Tenga Egg) to my repertoire - something I never did or had in my younger days.
I also have learned a little about prostate stimulation and use both external and internal massage to my wanking habits. I also frequently eat my own cum - something I never did as a younger man.
Overall, I'd say that I've learned to enjoy my penis and the pleasure that can be had from spicing things up by adding toys, paying attention to my balls, etc.