There are many review sites/channels, but I'm thinking more in line of something like:

HowLongToBeat.com, which is invaluable for checking how much time is required to finish a game, both for main story and side content

Co-Optimus.com for checking all sort of co-op experiences, depending on filters set (local or not, split screen, number of players, platform, genre...)

Meta/Open-critic (with all the caveats)

MobyGames.com for probably most comprehensive database on video games.

Any other contenders?

Keep track of what I am playing
Backloggery
Backloggd
Howlongtobeat

Guides
-Neoseeker
-GameFaqs
-Random youtube channels/videos

Game sales sites
-DekuDeals
-PSPrices
-XBdeals
-Slickdeals
-Isthereanydeal

BasilZero nailed it.
thats a /thread post right there :)

PC Gaming wiki has been an absolute godsend for me over the years when it comes to both modding and fixing old/new games. I'd actually put it's value worth over Steam Guides, since the latter has become a cesspit of emoji clown award farms these days.

How long to beat is indeed invaluable, I use it always before a purchase and base what I buy off it. Like No body wants to die is a game I want to play but I don't want to be in it for so long but when I seen on HLTB that it is 6 hours, it's an instant buy for me.

Consoles are now incorporating stuff like this in with activity cards on PS5 or the percentage meter which is often inaccurate (it's more like a loading bar that stalls from time to time) but it's better than nothing and I want to see features like that going forward but data gained from players who opt in and not QA so it can be more accurate, it's great to finish a mission in FF16 and while consider if you want to play the next mission with it's estimated time on an activity card. You'll be like, fuck the next missions a long one, might as well end it there and do an Astrobot level. It makes juggling games feel as good as maining a game.

As for stuff that isn't mentioned in the thread, a simple timer on your phone to be able to accurately record your gaming time so you don't have to rely on system clocks that are ticking over while the games is idle and you're AFK. For me, knowing how much I play accurately is very important and I really wish PS5 was more accurate, the games on the dashboard are so wildly off by absurd ammounts like doubling your game time and while the games list is more accurate it should stop ticking when the game is paused so it doesn't over track and in game clocks don't count the time you die and reload a save so they end up under tracking. 

Forum threads on here, below in my sig are also great to keep you on track and give your self a goal to prevent falling into a rut or wasting time with games you aren't enjoying or switching out your main games too much. A simple thing that really helps with time management and preventing burnout.

Yeah, HowLongToBeat really helps to give approximate idea about the length of the game - I tend to check (once you go to said games' page) Completionist/Average and Main+Extra/Leisure combination to figure out what it will take me to finish it (I'm not complenitionist, but I do tend to do most of stuff ingame, and at very leisurely pace). Depending on the popularity of the game, data is pretty solid (i.e. Witcher 3 data is based on 22K+ entries).

Well, other than VG Chartz for gaming news, when I want to see people opinion on a game, I go to Gamefaqs.

I have a few additions:

• GG.deals for, you guessed it, deals!
• PSNProfiles and Exophase.com for tracking trophies (PSNProfiles) and achievements across platforms (Exophase.com)
• NexusMods for mods (I guess it's still the place, outside Steam Workshop?)

Not a site or a channel, but the SteamDB browser extension adds some useful features to the Steam web client, perhaps most notably some price history details under the price of a game.

Whenever I want to emulate a new system I can always count on UrCasualGamer to provide a short and straightforward video guide on how to set up any particular emulator. The guy deserves way more subs.

Beyond that there's a bunch of good subreddits for any particular aspect of the hobby you may want to know more about. Wikis are awesome, too.

Digital Foundry for technical analysis. Been a few games I haven't bothered with because they performed like ass because of the host hardware it's exclusive on.