I always see different, cooler/cuter eyes when I watch anime/view cover illustrations/etc. so my style isn't static, it's kind of hundreds of styles put in one.
Recently, I've really been interested in Accel World's Chiyuri Kurashima's eyes. The use of a dark shade of the iris colour for the surrounding cornea (instead of default black) gives a good effect in my opinion. They still use the double light and dark 'U' though, which I've honestly loved since it first started appearing around 2005.
Here's a pic of Chiyuri:
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