I guess a lot depends upon how old you are & what you grew up drinking. I started drinking beer from the late 60s onwards - but never liked the chilled, fizzy crap that caused CAMRA to be born. Some of the beer I drank was awful, but a lot was very good indeed - if not to everyone's taste. I recall a pub in Plymouth in the mid 1970s, when I was doing a fish-farming degree there. "The Grand Duchess" was just around the corner & ideal for a lunchtime pint. Never has a pub been so mis-named! But, the beer was excellent. No cellar. No beer engine. It sat in barrels behind the bar, and was simply poured into your glass through a tap. So, pretty much flat, warm beer. No head, no bubbles at all. It looked just like a pint of brown water. But it had a lovely, malty flavour with a nice balanced bitterness and a whiff of dry hops. A couple of years later, living on Anglesey, I used to go to a pub run by a couple of "older" lasses - I think they were sisters. Not your usual local. The seating was apparently second-hand furniture, of all descriptions, including tatty 3-piece suites. Again, the beer was warm & flat - this time brought to you in jugs & poured into the glass. But, very tasty stuff!
These two examples are extremes, but I certainly developed a taste for low-carbonation unchilled beer. Which is what I produce with my homebrew. I've never checked the temperature of my beer - I certainly do not refrigerate it, but equally I live in a hilly area of SW Scotland, and (in summer) I keep it in the coolest room in our house, no direct sun, which is normally at around 16-18°C in summer barring a heatwave. This, for me, is perfect.
I guess it also depends upon the type of beer, though. To my taste, lighter beers are OK cooler (but not below 10°C, please!), but malty brews, or stouts, definitely need to be at ambient temperature to make the more subtle flavours accessible. I guess recommended temperatures for wine are an interesting comparison. It seems to be generally accepted that white wines are served at 8-12°C, and reds at 12-18°C, with the more complex ones at the higher end. I don't see why beer is much different. Just - for me at least - keep the lower temperatures for beers that basically taste of nowt anyway!