Wolfehunter: They made this game for Consoles first. They canned the PC version in favor for Mutliplatform nonsense. Game will be buggy. I won't be buying from them in the future. I feel your pain AwesomeMallard.
Oh come off it, consoles have absolutely nothing to do with bugginess of games. In fact, as opposed to PC-only releases, all major games released on Xbox and PlayStation go trough relatively strict quality control, including patches - as a result, Witcher 3 is a lot less buggy than the original was on release, and the original was PC-only. Additionally, developing an engine for multiple platforms forces you to adhere to more strict development practices if anything - that most certainly does not lead to more bugs.
As for a strong argument against "multiplatform releases are buggy", I present your with Total War games (especially since SHOGUN), Morrowind (it only got ported to consoles later), just about anything by Obsidian, original version of STALKER, I could just go on.
OneFiercePuppy: I'll say that I haven't had any of the problem you're having. That suggests that it's not a problem with the game, but with your setup. Maybe you're playing it on settings too high for your graphics card to keep up with? Maybe you've got a bad driver installed?
Thing is that CTDs, animation glitches etc. are relatively common with Witcher 3 - in fact I'd go as far as to say that if you claim to have never encountered a bug in Witcher 3 in full playtrough, you're either unbelievably lucky or you're lying. If you look at other open world games like, say, Mad Max, it was universally praised for being pretty and running on just about anything without a hitch.
While you're right that issues often arise because of unique hardware and software specifications of the consumer, it lies on developer to make sure their software runs fine on as many of these combinations as possible - and Witcher games were sort of historically riddled with bugs. You don't need to go far to find them actually, Blood and Wine added a brand new bug which is extremely widespread (even happened to me) where, after a certain quest, your lock-on might cease to function.
It's also bear nothing that a lot of bugs may not at all occur due to player's hardware/software, but rather due to random combination of his past decisions in the game, equipment he's wearing etc. - there's insane amount of such variations throughout the game, to the point it's nearly impossible to test them all.