'like' as a filler might indicate hesitance, I think. I used to suggest to students that they point it out to one another to try to eradicate it before going to interviews as a lot of older people can be intolerant, having forgotten how it felt to be unsure.
I remember when 'see you round' was in vogue, and the 'wits' used to reply with things such as 'not if I see you square'. Ho ho ho. There have always been people who look down on others for how they speak, and end up looking pompous.
I admit to raising eyebrows at 'why oh why. . .' (not the poster, but the construction
), as it conjures up a ham actor with the back of his hand on his brow, and 'NOT' used as a way of reversing something, so 'I really enjoy seeing 'like' used to indicate that the speaker is unsure of him or herself. NOT'. I don't know why people can't just say 'I don't really like . . .'
'Uni' makes me cringe, as it was imported via Neighbours and Home and Away in the 80s and took off here in the late 80s/90s, so sounds idiotic when said by people who went to university before then, as it would not have been the way they described the place where they studied.
We all have our foibles, but every generation has fashions for speaking. It used to be 'I turned around and . . .' but luckily that has fallen from fashion, along with 'at the end of the day', and 'at this moment in time'. To me, 'why, oh why' and 'XYX - NOT' belong to the same era. When things go out of fashion they tend to be annoying to those who don't use them. Innit. Ok, Jose? Comprende? 