You are right, we could be here for days but we've been here for years so, no worries.
"No worries" was initially, I think, a common Australian thing that has caught on a bit here.
There is a written phrase that is a little annoying and I do find myself using it from time to time but even I find it to be a little too common or "sassy" and that is to end a sentence with "...not so much".
"I like broccoli, eggplant...not so much".
I do find it to be usual when someone uses the same phrase over and over in every post such as "to the one...to the other..." or "ya know" or "it reminds me of the joke, well nevermind". How can you use these same "crutches" over and over in every post? It works for Rodney Dangerfield in a comedy routine "I get no respect (over and over) but anywhere else...not so much"
On the other hand

there is one meaningless phrase, I guess, that should annoy me but doesn't and I use it where appropriate and it actually does have meaning, IMO..."it is what it is".