For me, the thick stroke along along with the "lakes" that double the line with is just driving me NUTS(not that I had far to go...) It's not that I mind the thick stroke on your continent outline that much, but when you put it with the number of lakes AND with the number of lakes that are in such close proximity to each other or the Sea it's just very distracting. This is especially true for the lakes that are so small as to show no hint of water(ie, just a big black dot). Sooo... my personal opinion would be to change this in some way: reduce the stroke size, kill some of the lakes, etc.