I was feeling the same way the first week I used my 510. I kept it up and hated those carts. I tried filler after filler, modding the cart, cursing the cart...then I discovered dripping directly on the atomizer, get that cart outta here! Well, I've been loving this thing ever since. I've seen it referred to as "tailpiping". No, I've never burned my lips, never even came close. I put about 2 generous drops (maybe 3) right on the arch and vape away. If it gurgles, I blow the excess out from the battery connection end and it starts "smoking". Feels like a cig, tastes like a PV (sooo much nicer than tobacco).
I have found the tobacco flavors to be not anything close to tobacco and more like the bottom of a week old trash can but I suppose that's all personal taste. Ugh.
I get my juice from ecigsmokestore. Dawn and George are just good people and Dawn can whip up flavors that make you say "mmmmmmm" everytime you vape. They are currently working on getting a credit card acct. set up since Paypal swooped down on them and cut them off. It's ok by me, they are worth a little extra trouble to get my juice. Wherever you get your juice, you will probably have to sample a few before you find your favorite. Try dripping--in my opinion, those old carts just stand between me and my nicotine. You will also want to experiment with strengths. Crank it up if you aren't feeling satisfied with the lower nic juice.
Good luck!