Tobacco flavors are difficult. Some people like naturally extracted tobaccos (NETs) that taste like real tobacco. Some people like favors that taste like actual cig smoke (ECBlends has a flavor called Ashtray that tastes exactly like a nasty cig ....). As a menthol smoker, I naturally gravitated toward mentholated flavors, tobacco and otherwise when I started vaping. My preference, at this point, is the desserty tobaccos, where tobacco is the back note to a candy, cream or pastry flavor.
So, as others have said, it's best to spend on some samples from different vendors in different categories to see what you like.
Here are the tobaccos I've reordered:
At this moment I'm vaping Ol' River from Rocket Fuel. Of all the categories I've mentioned, I think it sit at the middle of the road. It's got some sweetness to it, but it's not sickening. It also doesn't taste artificial. Just a good straightforward vape at a decent price for 30ml.
Ol' River: Brown Sugar Tobacco Eliquid
In the desserty category I like Boba's Bounty by Alien Visions and, even moreso, H1N1 by Nicoticket and, even more than those, Groundbreaking by Bionic. They're not something I can vape all day but work well as a desserty treat in the evening.
Boba's Bounty : Alien Visions E-Juice, Satisfaction Guaranteed
(make sure you're ordering from Alien Visions and not Alien Vapor which makes a disgusting knock off of Boba's)
http://www.nicoticket.com/the-virus-h1n1/
Ground Breaking – Bionic Vapor
For menthols, I really like Hurricane's Vice City Ice. It's like a minty tobacco with notes of cocoa or coffee. It's heavy on the menthol however.
Vice City Ice - ALL - Storm Juice
None of these options is on the cheaper end of the scale but, with tobaccos, I find you get what you pay for. For what you get, I think Ol River and Groundbreaking are the best bang for the buck.
Obviously this is just my opinion based on limited experience. There are a lot of great vendors and juices worth trying. Also, if you really detest any sweetness and prefer savory or earthy tobaccos, take my advice with several grains of salt. I'm still exploring too. Next up is well-regarded cheapie called Dueling Banjos by High Dessert Vapes.
Lastly, the most important thing to keep in mind is that the best tobacco flavors usually need plenty of time to steep. Many of them will taste like garbage for up to a month before the flavors settle in. Ol River and Vice City Ice are pretty good right off the bat but I wouldn't touch Boba's or Groundbreaking for at least a month.
Good luck on your search.