I dunno about Hank Sr., but the sound of Hank Jr. makes me want to hang myself.
The sad thing is that his son, Hank III (not his real name, but changed it to capitalize on his dad and grandad's name) is even worse than Jr is. Understand that if you took Jr and III's music and compared it to Sr, III is going to sound more like Sr. My problem with III is III himself.
The guy is pure honky-tonk when he's doing country. But then he takes his hair out of it's ponytail and starts playing hardcore in the same shows. Heck, he's the bass player for Phil Anselmo's group Superjoint Ritual. Put that on your resume. "My bass player is the grandson of the probably the most famous Country & Western singer in the 20th and 21st century".
What I don't like about III, is that he's basically a scuzball. He only took up the name of Hank III because of his drug habit and alimony payments. IOW's cash in your grandad's name and make some money.