Seems many of my favorite handguns don't have rails, or the older versions didn't anyway....
my old W. German P226
the Beretta 92fs
most 1911's
My brother has an older G19 with no rail, although I'm not a huge fan of Glocks, his non-railed G19 has earned some 'cool' points with me
A friend of mine owns another pistol that I've become quite fond of lately, the FNP-9. It does have the rail, however .... it is just a sheer joy to shoot, I find it to be one of the most under-rated pistols today.