I have nothing against sun flare. I think it can look cool. Hell, it looks so cool that people add it in even when it isn't there (see criticisms of JJ Abrams' Star Trek). So, just a few things to consider...
1) There's often a natural tendency for the eye to gravitate to the brightest spot in an image. I'm not an expert and I haven't studied that phenomenon in depth, but my understanding of it is that it is likely instinctual. A trait that is hardwired into us by evolution. If that's the case, then one would do well to utilize it as the image dictates. Placement of such bright spots needs to be carefully considered and will likely not work with every image.
2) Such situations can often result in large areas of the image being completely blown out white. I'm not saying to not do this, but it needs to be utilized effectifely and with care. It won't work with every image.
3) Another thing to take into account is the QUALITY of the lens flare. The way it looks is in part determined by lens construction, and it is entirely possible for two images to have lens flare in the same spot, but one of those lens flares just looks ugly because of the lens that was used. If you're gonna do it, make sure you're very familiar with your equipment and use lenses that will give you "good" flare rather than "bad" flare.
All I'm saying is, be careful. It's not gonna be something that works for every photo, unless every photo is actually about the sun and its glare. Some images simply aren't gonna be about that, and I'd tentatively suggest that you learn to just let the images be what they're about and not try to force them to be something that they're not.