The ones I saw growing up in Texas were simple lights in the sky that behaved strangely, or simple silver discs, with the exception of one dark grey, cigar shaped object, and another that looked like a cylinder.
My friend saw one in N. Texas a couple of months ago. He was out driving near the lake, and said he looked up and saw a silver ball in the sky. After a little bit, it just rapidly took off.
The ones around here recently, seem to be orange or white balls of light. My wife and a friend have seen them over the last couple of years, late at night.