I have a Provari mini and a couple of Twists after starting with a 510 and then an Ego-C and it makes a world of difference. Also, I didn't see anyone mention the fact that you should be prepared to have your PV in your mouth almost constantly at first. You can't think of it as taking a quick five minute session and then putting it down for a half hour the way you might have with analogs. I vaped almost constantly at first, although now I don't need to vape as often and am okay not vaping for a couple of hours at a time. I had a problem with finding a juice that satisfied me at first, too, as so many of them tasted too sweet for me and I didn't like any of the tobacco flavored ones. I finally found one that works for me and I hope you will, too. You have to be open to trying ones you think you would never in a million years enjoy.
When I started with the carts that came with the Ego-C, all I tasted was plastic, too, but once I switched to Stardusts and then the Vivi Nova, the taste of the juice really came through. I've found that even now, if I'm not careful about the way I hold the PV, I can get a nasty burnt plastic taste. If you tip it too far up, the juice doesn't get to the atty and if you don't tip it enough, it doesn't reach the wicks. It's definitely a learning process. At least with the Stardusts, I can get a burnt taste on a hit, adjust the way I'm holding it, and have it taste good again, whereas with some of the cartos, once it's burnt, it's ruined for good.
I started out thinking I would only want tobacco flavored juice, didn't like that so I tried about fifty different juices from candy to fruit to bakery to drink flavors. There are a couple I like as a treat, but only one I am happy to use all day long and that's Fiddle Faddle from Kick Bass Vapors. It sounds like it would be sticky, sickeningly sweet, and I'm surprised I even tried it, but it has a salty, buttery flavor that works for me from my morning coffee until my last vape of the day. It's the only juice I've found that completely hit the spot for me. I hope you find one that does the same for you.
I enjoyed the taste of analogs, too, and even after almost three months without one, when I walk through a crowd of smokers, I like the smell. But when I think of picking one up, lighting it, and inhaling, the thought grosses me out and after thirty years of smoking, that's a miracle.
Hang in there and be willing to be flexible. Don't force yourself to stop smoking completely the second you start vaping. Just vape when you feel like having a smoke and if you smoke some analogs, too, don't sweat it. The less pressure you put on yourself, the more likely it will be that vaping will become more enjoyable than smoking and you'll find yourself reaching for your PV instead of your lighter. Hopefully, one day soon, you'll realize that you aren't enjoying smoking anymore and realize you haven't had an analog in hours without missing it. While you are trying different juices and different strengths and different PVs, smoke when you need to without guilt. That's what worked for me anyway. Knowing I could have one if I wanted made me not need one, if that makes any sense at all.
Good luck!!