Likeable...? Well, it varies.. Generally, he comes across as the "working class" anti hero. Not evil or psychotic or anything. More a guy just doing it to make a living, and doesn't justify what he's doing, but lives by a moral code (No killing women or children, no unneeded violence or property damage...)
He can be a total bastard, or he can be down to earth and relatable.. Depends on the writer.
But him and Wally were pretty much friends.