Do what I do - collect every title and pet that ISN'T on the Cartel Market. I just use my monthly CCs for Legacy perks and don't have any Cartel Gear or speeders except the Tython saber (couldn't pass that one up).
I can live in my own bubble where the game never went F2P and got a cash shop.
Unfortunately, as long as I see someone with it, I will know it exists
And I love pets--even if I could skip some of the other cartel stuff, I really wouldn't forgive myself if I skipped the pets. As it is, the Cartel Packs won't be around forever--eventually, some will be discontinued for new ones :/