I do on all movies.

That kind of depends on how close to release they lift their embargo this time around. If it's earlier than with BvS and Skwad I will hardly be able to avoid getting to know certain numbers and opinions, but if they keep things quiet for as long as they did last year I will automatically draw certain conclusion from that anyways.
I guess I'll do it like with BvS, in which case I looked at the RT score once (when it was still in the 40% range) and skimmed over a handful of reviews (which seemed to confirm all my fears and doubts about the movie, and then some).

Actually, I might try to do it. (Maybe even with Wonder Woman.) Just to see how my overall experience with the movie will be if I won't be fixated on the notion that the film might have unpleasant reviews. Of course, it will be very hard to do it in this day and age. So I'll have to avoid any of the places on the Internet that can spoil it. Which means, I have to leave Internet completely. Since even if you'll just go on YouTube without looking for the reviews, most likely there will be some videos about that in recommendations. Most likely by ComicCringeCast, since they love making crappy clickbait titles that pop out in everyone's recommendations. And it will most likely have the tile, "JUSTICE LEAGUE IS THE WORST MOVIE EVER! DC IS DEAD!"

I avoided every single review and Rotten Tomatoes score for BvS up to it's midnight showing.
As soon as I sat down, my girlfriend says, "I heard critics are ripping this a new beep
So I will attempt to once again avoid critics and reviews unless my girlfriend ruins it for me again.

Truth.

Snarky much?
=w=

No, of course not.
I know how to make a value assessment of other's opinions.
Don't you?

Dude, nobody is wrong if they think it sucked. If you like the movies, fine, but don't insult people if they don't like it.

Nah. I'd read it. Read and then see how wrong they really are about the movie this time around.
I'm the thing that keeps you up at night, the evil that haunts every dark corner of your mind

Really hard not too because I do watch certain movie reviewers and listen to their though on movies. And since I am usually on the internet everyday and come to this board, it's hard not to here any kind of positivity/negativity about a film online.

Ooof. Did it really hit you that hard?
Personally with WW I'm going to be checking the reviews, because that's a film WB really can't fck with and it will probably break my heart a bit if they ruin it. With JL I oddly could go either way, since it's Zack.
=w=

Will you try to avoid Rotten Tomatoes, critics, reviews before going in?
I did this with BvS and learned my lesson the hard way, I just don't trust WB/DC at this stage to avoid checking on some reviews first.
To make a great film you need three things - the script, the script and the script -Alfred Hitchcock

In the sense of not having your expectations swayed one way or another. I've personally have wanted to try it for a new release, because as a kid you'd see a movie on TBS or TNT, but there wouldn't be a rotten tomatoes for you to access in 30 seconds, or even a trailer, and sometimes you'd find a movie you enjoyed that your may have not given a shotor sometimes you just find garbage.
=w=

I've seen all the DCEU films in theaters. Even Suicide Squad. Why stop at Justice League? I've seen worse reviewed films in theaters before anyway. It's only $7.50 where I'm at.
Whatever you are, be a good one.

As much as I can, yes.
"A big ball of wibbly wobbly, timey wimey stuff"
The Tenth Doctor explains all.