No. But our (perceived) likes might be. Keep in mind that certain things not only have a functional/aesthetic value to us, but also an emotional one. We use words like nostalgia, which is essentially a high emotional attachment to something. That attachment might be due to it being your 'first', it might be because it was in a (perceived) more fun/saver/simpler time of your life...
But how much such things influence our taste really depends on the person. For me I recognize that I have nostalgic feelings toward the old 2e stuff I grew up in (RPG wise), but absolutely recognize that it isn't the perfect game nor was it a perfect time. D&D Red Box or 2E aren't the version of D&D I would play if I could play only one version of D&D, nor would that be Red Box, 3(.5)E, certainly not 4E, maybe 5E but I also don't think it's the best, but it's better then the rest. My best version of D&D would be something between 3.5E and 5E. Maybe the new 5.5E is my perfect D&D, maybe 6E in another decade, maybe no version of D&D will be perfect...
How or if our 'tastes' change also depends on how we develop. We might value our time differently, we might value money differently, we might prioritize other things before our hobbies (like a family, work, etc.). After 35+ years of D&D and other RPGs certainly my tastes have changed, it's not the oldest stuff, it's not the newest stuff. Often I like older fluff over newer fluff of established IPs. But game mechanics I often like newer, not for everything, because sometimes people make things too simple... It also depends on what I'm in the mood for. It's not all D&D, all the time...
I liked Pathfinder for the longest time and the new PF2e Core looks interesting but effectively having an 800 page PHB (Core and Core 2) might be a little too crunchy...

On the other hand, I get exposed to things like Wildsea, Mothership, Spire/Heart, Blades in the Dark, Kids on Bikes, etc. And sometimes RPGs just go into a direction I don't really like anymore, Shadowrun is a good example of that. I'm not mechanically charmed by the new editions and the changes to the setting certainly don't have me exited... That just means for me I can still like an old thing, but there are also new, new things I really like. And almost feel obliged to stay 'loyal' to D&D, because to our group it's a kind of 'save space', a 'neutral ground' if you will for us all. Even when we make excusions to other games, we always come back to D&D...