Saints ground was a fight for standing at the end, never mind where I think it need to be down one side like at wire, Mal Kay wanted standing in the corners.........

I think it makes a big difference to the atmoshpere, but ultimately, if a team is not playing well the atmosphere suffers.

Headingley and Halliwell Jones stadium.

I know it doesn't really answer the OP's question but the single biggest factor imo is location. Easy access from public transport and decent car parking within walking distance combined with a selection of pubs in the vicinity ticks all the boxes.

As for the stadium itself I just like them enclosed, whether that be rectangular with the corners filled in or an oval I don't much care.

I do like he bowl type stadiums over rectangular. One of the best examples is the Bolton Wanderers home (what ever it's Called now)
The sweeping lines of the roof do make it pleasing on the eye.
Another aspect is ease of access from the road network, so edge of town rather than city centre.
But most inportant to me is been able to stand and watch my rugby. I may be getting on a bit now, but I don't take a tartan rug to games yet.

For RL in this country, something shaped in a similar way to the Keepmoat but with one of the side stands (west side) slightly bigger. Capacity of 20k. One end fully standing, one side (west) fully seated. The opposite side to have seats at the back and a decent sized terrace paddock at the front. The other end would be a mix of seats and standing for visiting fans.

Massive car park close by, 6 pubs within a half mile radius.

TBH I don't see what the fuss is about not being able to stand, the seat gives you a guaranteed amount of space (ok some grounds are worse than others but still), you can also get your 'spot' with a seat more often than not particularly if you're a season ticket holder.

Standing is not much cop for kids, especially so if it's packed and IMHO I still think it isn't ideal from a safety POV. Sure if they're standing at the front but then they are at such a low level it's hard for them to see everything as you're already that much further away from the action at the ends.
I loved standing BITD and when I started going on my own to the Boulevard at the age of 9 I'd stand right at the front on a bit of wall pretty much right next to the speedway gates. I went into threpenny a few times when I was older but it wasn't ideal unless you stood near the front from a viewing POV.

Apart from the car park you've just described the New Headingley

Conveniently obscuring the away end which isn't getting touched?

I know Hull KR's stadium might not be the best, but the East Stand has to be the most atmospheric in the English game.

Still think all seating affects the atmosphere, ideally for RL there should be some standing, must admit though when your lot boo the ref it can be deafening

Well spotted. With some of the garbage refs we've had this year, we've had lots of practice.

Probably, a ground like Doncaster's but with some standing would be perfect.

Maybe then other clubs to create the perfect atmosphere like at Rovers, where they is no booing and no fans ever leave before the end