I think there are actually 3 questions in there, all of them fun!
Consumption:
Last year marked 20 years of drinking Port for me. My first bottle was a 375 ml bottle of Porto Rocha 20 Year Old Tawny Port that I was given for my 40th birthday. For a few years, I really only drank Tawny Port. My consumption was so... abnormal... that Roy gave me the nickname "Mr. Tawny". (Lisa changed it to "Dr. Tawny" the first time that I visited DR on one of Roy's tours.) I really only began to slowly include Vintage Port (and the occasional LBV) into my drinking between 2010 and 2014, in part because I really wasn't sure which producers I liked and how old I liked my VP. As the years went by, my VP consumption slowly increased as a share of total consumption, to the point that these days I'm probably pretty close to 50:50 ruby vs wood-aged. And since White Port is now a thing, that means my consumption of Tawny Port has dropped quite a lot! I probably still drink more Tawny Port than White Port, though, so the total is probably something like 50:30:20 or maybe 40:35:25 representing VP:Tawny:White. That is likely skewed by the fact that a significant part of my consumption happens at Port Club now, and our group tends to bring a 50:50 mix of VP and wood-aged Port.
Cellar:
I originally bought and stored Tawny Ports like some crazy person. I wasn't aware at the time that they're not meant to be aged. I still think doing so is fine in many cases, but I've had enough "tired" Tawny Ports now that I'm trying to control my bad habit.

As I started enjoying Vintage Port, that rapidly took over most of my cellar, but it's never really gotten higher than about 70% or maybe 75%. I still have
a lot of Tawny and White Port on hand. But since one is actually
supposed to age Vintage Port, that quickly becomes the largest part of one's cellar even if one is drinking as much or more wood aged Port. Tawnies and Whites cycle through faster... VP is bought and then kept for years and years before being opened.
Palate:
My palate has definitely changed over the years! I originally like 20 Year Old Tawny Port the best, with a mix of roughly 30 year old Colheitas thrown in for variety. That slowly drifted older (and older), to where now I'm most likely to grab a 40 YO to open on any random evening, or maybe a 30YO if I'm feeling like something slightly younger. I tend to drink blends far more often than Colheitas on my own, but I have a supply of very old Colheitas to bring to tastings. 30s and 40s are awesome with a nut & cheese course!
For Vintage Port, I originally liked them really old. Somewhere around 50-60 years old was great with 40 kind of serving as the younger side of my preference. I do still very much enjoy drinking old VP, but my preference now is for something that's 30-40 years old depending on the producer and vintage year. I like them solidly mature, but only just. Something from the 1980s if it's a primary producer from a generally declared year, or from the 1990s if it's a secondary producer or an off year. No longer boisterously fruity, but not yet completely secondary either.
White Ports are a much more recent thing. And while I do like a well-aged White Port, I generally prefer the younger end of the spectrum. 10 Year Old White Ports, or a Colheita Branco that's 12-20 years old. They're just so luscious and juicy! I'll drink sweet ones on their own, or something on the slightly drier side (but not a Dry White Port) if I'm going to have it with food. For me, at least, a 10 YO that's slightly drier goes well with the same food with which others might drink Champagne, a white wine, or even a Pinot Noir. By the time others are drinking Bordeaux or a California Cab, I need to switch to a VP or LBV. But try it some time - a slightly drier young White Port pairs well with a wide range of food!