I've smoked a good number of hand-rolled cigars over time but could not honestly tell you they tasted sweet in my mouth, nor can I tell you exactly what tobaccos were in them. That would be the master blender's secret, sorta of like "I could tell you exactly what's in the blend, but then I'd have to kill you." The rollers do not know what's in the blend either, they are just given the leaves and told what proportions to use in the cigar. What I can say is some cigars have had a sweet 'smell' that I experienced by toking a mouthful of smoke, then half-way inhaling the smoke, closed my mouth and gently exhale through the nose. By doing this I have experienced 'tastes' like cinnamon (or a sweet spice 'flavor'), citrus, caramel, black cherry, chocolate, coffee, mocha and a variety of 'tastes' that are indescribable, but pleasant.
If you want a high quality cigar, at a very decent price, then try the Drew Estates Natural, Juicy Lucy, which has a sweetened wintergreen flavor added to the head of the cigar, and a 'taste' of caramel (see above instructions). But, and here is the key to getting the caramel 'taste', the cigar must be properly aged at least one full year and two is much better. Also try the Drew Estates Natural, White Rabbit for a consistently sweet 'taste'. That one needs at least 2 to 3 years of aging, but those cigars will be consistent. The White Rabbit has a much more complex sweet 'taste' than the Juicy Lucy and it doesn't have the added wintergreen flavor on the head.
So, my input would be to spend lots of money buying all sorts of 'smokes' age them properly and once you find what you like then buy all of it you can afford.