SP. Watched trains growing up at Chaney Yard/Jct. at the south end of Houston Heights.
Also SP followed US 90A, to Ragle Lake, FM 102 to near Columbus, and US 90 to Schulenburg. So I got some urban and rural running.
Saw some of the last black widows and F units. As a young person in early gtade school, I did not know any better, and called them the "curved nose locomotives".