I like my Protanks but ended up in much the same boat. Not really interested in DIY, although I will dabble soon enough if I can get at least one flavor I enjoy.
As great as it is to be able to carry your PV around, pick it up and vape at any time and put it back down without worry... I just wasn't happy with how much juice I was going through. Seems to be much better with the Protank II, though. I naturally ended up using RDAs as I'm a "flavor chaser" but let me just say - I get TONS of vapor, amazing flavor (so much better than BCCs), and I go through 4-5x less juice even though I vape much more. A 30ml bottle will last me a month, granted, I usually drip with many flavors throughout a day.
If you vape a lot in and around the home, highly suggest looking into getting a decent and affordable RDA, learn how to wrap some micro coils and install cotton wicks... you will be surprised in many ways by the quality this setup can give you.