There aren't many things I've bought that I regret. The four or five Venvii Baby Ness Mods I bought are definitely among the few vape things I regret buying because the battery life is terrible. More than regretting what I bought, I regret not buying more vape gear. I've got a good stash, but I am always worrying that I need more.
My biggest vaping regret is not learning to DIY juice sooner.
It does frustrate me when i see newbs going down the flavour rabbit hole and spending a small fortune chasing unicorn juice for 2 reasons
1) its expensive, learn to mix and its orders of magnitude cheaper
2) i tried it myself and i came to one startling conclusion, flavours didnt work for me..maybe because the essential truth is when i smoked, it was one flavour for 35 years. Which is why unflavoured was the key, almost no taste, but consistency you couldnt find in any juice on the market, whether it was premixed or mixed from doublers or concentrates. People ask me "arent you tired of unflavoured after 4 years"..."No", and its the one thing that saved me from go back to smoking. Unflavoured is endlessly repeatable, no steeping needed (yes it can improve over time as with any juice), but its essentially shake and vape. When i was vaping nic my weekly vape cost me AUD$0.72...
I always find vape reviewers pulling out a bottle of juice and talking about it like its a fine wine from the Bordeaux region of France highly ridiculous. Its right up there with them banging about their quad alien blah blah clapton from <insert some guys name here who im supposed to believe is some sort of necromancer when it comes to wire and is better than me and my screwdriver and straight round wire builds> on facebook...
Vaping is utilitiarian to me, i have no time for the faffing...