Fair enough, some SLI's are indeed more "serious" in their demeanor than others.
I think Harrison Ford is a good example of this more serious/Te type of SLI, but even he's far less rigid and more relaxed in his behavior than Eastwood is
Another thing, do people see Eastwood's demeanor closer to an ESI/Se creative or SEI/Si dominant? I see him as much closer to ESI personally...