Well, just remember that when it comes to sexual preferences, there's just a wide variety of what people like. Just like with taste in food - most ppl say they like Pizza, but not EVERYONE does, and even among the ones that do, some like more sauce, some more cheese, some like thick or thin crust. Also, since this was your first time trying this, you may not have been doing it in a way you found pleasurable - you'd have to experiment a little, find the right water temperature, how much pressure, etc. - you might have had it set on a very high pressure setting that was just too strong for you & instead of being pleasant, it was uncomfortable or even painful. Or maybe you weren't hitting exactly the right 'spot'. Most shower heads have several different settings, from thin, needle-like spray to something more stream-like or smthg pulsating & different things in between. Try some different settings & see if one of those feels better to you...
You prbly shower every day (or nearly so), so you'll have plenty of chances to try different things & see what you like. Remember, there's just so much variation in what ppl like - for example, prbly most women & girls like vibrators, but maybe not everyone - some may just prefer the touch of their own hand. Believe me - there is no 'right or wrong' in this - you just do what YOU like & don't worry if others thinks it's weird! As long as you're not involved in hurting someone else or abusing a minor or doing something without their consent, you're free to pleasure yourself however you like.
And one more thought - you may not necessarily be 'locked in' to that forever - some ppl may masturbate one way for years & then suddenly find out they like smthg that didn't do anything for them the first time they tried it - and that could happen even many years later...
Everyone is different. Just do what you do think feels good and don't worry about it.
Yeah, I agree with the others.
The shower head provides a certain type of pressure you just may not like. That's okay. You like what you like, they like what they like. No shame.
As Bonzo said, those likes may change over time. Maybe it's your particular shower head, and at some point, you may like it with another one. You might not. It's all good either way. :)