I'd really like to see a cursor that would have options such as size, color, shape, and the like.
Ok, yeah, I'm getting old and feeble, but at the size it is, it can just disappear on me. There are a few plug-ins written to enhance it, but the two I've seen are more distracting than helpful. Just a choice between five or six sizes would do the trick. Color change would help too, maybe a setting for blinking, and cute little emo pix, pussycat heads, jack o' lanterns, Ninja Power Transform Ranger Mutants...
You get the idea, more visible!