It depends on a few things, but I have found that speaker placement is mostly speaker dependent. I had a pair of KEF Reference 5 speakers that sounded their best when almost facing straight forward and 3’-4’ from the front wall. The Sonus Farber speakers I have now sound best when aimed at my shoulders and 3’ from the front wall.
Who positions their speakers straight ahead (zero tow in) and why.
I’ve been experimenting with toe in and tweeter position (inside v. outside) for my LRS and ProAC Studio 3 speakers. My listening position is about 8.5 feet from the speakers front surface.
In both cases I ended up with tweeters on the inside and zero toe in. I like the more immersive soundstage I get with zero toe in. I sacrifice a little of the lock in for the center image.
Zero toe in also makes my sweet spot for listening a little wider.
Sorry about the incorrect spelling and the missing question mark in the subject. I couldn’t edit the subject.