Jackman just wasn't animalistic enough for me, I guess. I felt like he could've perhaps used some light prosthetics on his face to emphasize more of a borderline werewolf look. Maybe had his eyes glow a few times, as Wolverine's do in the comics at points. The guy is just so frigging handsome and dapper, too handsome and dapper for me. That said, I only watched the first and third movies, so maybe he proved me wrong.
As far as the father-son thing, yeah, that was the original intent of Chris Claremont and John Byrne. In fact, Wolverine was actually supposed to look quite a bit like Sabretooth with his mask off, but Dave Cockrum drew him unmasked before they could have a chance to reveal Wolverine's face, thus giving us the Wolverine look we all know and love. That's why the first Sabretooth-Wolverine encounters revolved around the idea that Sabretooth mysteriously knew Wolverine's birthday, in spite of nobody--including Wolverine--knowing anything of his own past and would make a point to find him on that day and beat him within an inch of his life and also sometimes kill his loved ones. That's also why Sabretooth would talk about proving that Wolverine was always going to be weaker, never gonna measure up, etc.
Eventually, in Claremont's final issue of his original run of the solo Wolverine title, he had Sabretooth reveal that he was Wolverine's dad, much to Wolverine's dismay. But then, for whatever reason, the writer that took over had it retconned, with no real--and no good--explanation. But personally, I always take that original storyline as the authentic one, mostly because I like it better and because undoing it just sucks the wind out of those previous stories.
A funny thing, though, is that Claremont at one point felt Sabretooth lost his edge and wanted to explain that every Sabretooth you'd seen except in Wolverine flashbacks was a clone and that the real Sabretooth was in the shadows, lurking on the outskirts of the Marvel Universe. It is funny, because some of the comics where Sabretooth may've not seemed sufficient unbeatable as a villain were written by Claremont himself. I get wanting to retcon crap like Black Cat totally manhandling Sabretooth, but making every version that jobbed a clone just seems going too far.
As far as the look, I don't know, masks are just cool, IMO. One of the reasons I don't have an interest in superhero movies. Too much tech, too much armor and not enough masks. I don't wanna see handsome, shredded guys punch each other. I wanna see masked men in cool costumes punch each other. It is not the same thing.
