This is kind of tough to answer because after you've been vaping for a little while (a week or so, maybe less) cigarettes taste like absolute sh**.
That said, my favorite vapes so far are all primarily tobacco flavors. My ADV is Tribeca from Halo, it's what they call an RY4 (tobacco with caramel and vanilla flavors). The caramel / vanilla is somewhat understated, and not particularly sweet tasting, but really makes the tobacco sing. Their Voodoo is also really good, but has some plum and other flavors (I like it at night time, and for some reason it is delicious with bourbon). I also tried their Freedom Juice, in 1.2% nicotine and found the flavor and vapor production to be weak.
Another I've tried recently is the Tennessee Cured from Johnson's Creek. I love the flavor but I got the 100% VG version, which has very little throat hit. I think I'll like the PG / VG blend better.
From what I've gathered, people end up finding that the flavors they love can be totally different from what they expected. I've seen a lot of people on here who were non-menthol smokers that end up using mint flavors as all day vapes.