I should have clarified my statement better ... sorry ...
When I talked about lens flares, I meant mainly from exterior or "movie" style views. In FSX, I typically fly most of my trips through the Outside Spot View, in which the lens flares don't break immersion for me. I'm a writer as a hobbyist and semi-professionally, so when I conceive of storylines, etc, I tend to think in terms of movies. IE, I see the scenes as a movie would portray them, lens flares included.
If I'm in a cockpit, the lens flares do break the immersion a bit, but it's not completely deal-breaking for me.
Although I do have to point out that even the human eye DOES see lens flaring. It's just perceived slightly differently due to the differential between the eye lens and the retina, but it is there. Tears on the eye tend to exaggerate this affect, but most people don't really notice it because they are accustomed to it and the brain compensates for it on a sub-conscious level. To see it, you have to really train yourself. Since I do artwork as well (traditional, as well as 3d CGI work), I can "see" it, but not in quite the same manner as portrayed on television or the movies.
That being said, NO lens flare would be better in my opinion if and only if that damnable midnight lens flare from FSX can't be corrected. I ran another Dallas to Austin run last night and quit once again because of it.
/sigh.