re: Most and least aesthetically pleasing stadiums in the SEC?

In no certain order... the ones I have been at first hand:

Missouri - outside of stadium is nice. Never been inside. Very modern outside after recent updates. I actually like the big M. Very different tradition compared to the rest of the SEC.

Arkansas - somewhat like Ole Miss... seems like it has been expanded and added on without much of a long range plan. I was there before the latest expansion; the amenities are supposedly very nice. The field level had field turf but natural grass to play on. Rubber scrub chunks from the field turf was the worst I have even seen, probably emptied out my shoes a dozen times.

Ole Miss - somewhat like Arkansas... seems like it has been expanded and added on without much of a long range plan. I was there before the latest expansion; the amenities are supposedly very nice. And of course, the Grove has great tailgating. Frankly, it is only better than Bama if you consider the popular hype, but still quite nice. Certainly packed into a smaller area.

Miss St. - Wade Davis clearly undersized but the boxes are nice. Ate an exceptionally fine ribeye there during a game once. I liked it. Flyover was a biplane joke. Unexpectedly good game-day experience. Except for the cowbells. I hate those things.

LSU - incredibly loud if LSU is winning a tight game. The location I sat at swayed under the noise and stomping. Tailgating was impressive and even opponents fans were invited freely to sample. I don't think any other location has as many tanked fans entering the gates for pre-game. Unfortunately, much of the tailgating food was unidentifiable so I didn't eat it. Y'all would probably love that stuff though.

Kentucky - saw Commonwealth before the latest upgrades. Was nice but not outstanding, just average. Liked the field grass. Had easy access parking. Very friendly towards guests.

Vanderbilt - the stadium is woefully outdated. Concourse movement is absolutely miserable. No amenities to speak of, they are in a class of their own compared to the rest of the SEC, and not in a good way. But, it is so small and stands are slightly elevated above the field so there is not a bad seat in the place. I used to order a Vandy family pack season ticket set for under $300 - that was for 8 games with two adult and two youth tickets in the corner of the end zone 20 rows up (less than $10/ticket back then!). I'd go to the Vandy-Bama game, sell the other SEC games, and donate the directional school games to charity and take a tax deduction. Best ticket value in the SEC by far and I made a lot of money.

Tennessee - beautiful location near the river but that's about all I can say good about it. Horrible stadium. Very steep stands, upper decks can induce serious vertigo. Erector set is an apt description. Horrible bench seating that seems to be re-striped every few years to claim more seating capacity. Many seats are only 13-14" wide. Miserable fan experience IMHO.

Auburn - similar to TN outside the stadium. One of the trashiest games I have ever been to, literally the ground was heavily littered and trash cans were overflowing and nasty. Tons of steel showing. Inside is much more nice. Auburn does a great job with a fun game day fan experience.

Alabama - Gotta love BDS. Very classy modernization efforts and the amenities are top notch. Maybe a little too big though. Great blend of red brick and stadium external walkways and history/memories. Great tailgating on the Quad, really as good as any in the SEC that I have seen. Gameday greatly smoother since re-organizing ingress/egress from I20/59 a few years ago, and will be even better when the interstate construction work is completed. Auburn really does a better in-stadium experience, though. OVerall, very nice but not a cheap family outing. An SEC gameday for four will cost you all day long and $600 or more.

JMHO. Your mileage may vary.