As you may already know, you'll never find an e-juice that will taste just like your old analog, so don't waste your time and money looking.
If someone smoked analog menthols, a menthol e-juice would probably be a good place to start. My first juice was Smokeless Image's Ice Menthol. It was close enough to my Marlboro Menthols, and I still occassionally vape it today. Probably any "ice" flavor should work.
Menthol added to fruit flavors seems to be a new craze. The menthol gives the fruit flavor a little "oomph" and cools the vape some.
Mr. E's Juices has a full Ice Collection of mentholated fruit flavors.
http://www.mister-e-liquid.com/the-ice-collection/
The real cool thing about electronic cigarettes, I found, is that there are literally hundreds of flavors. Tobacco, coffee, desert, fruit, flowers, even bacon and pizza; you name it. Makes me wonder how we former smokers were so loyal to just one brand. The key thing is to find at least 2 or 3 flavors that you wouldn't mind using throughout your day.
I've learned to cut my losses on new flavors by ordering sample packs or trial size juices from different vendors. To avoid wasting an entire carto or tank on a new flavor to test out, I use one of the newer ce3 carto/clearo devices. They hold a minimum of juice, are clear to see the juice, no filler to alter the flavor, are inexpensive, and mostly re-usable. If you don't like the flavor, remove it, rinse the ce3 with water, and refill with the next juice. They do need to be filled/emptied with a needle and syringe (usually supplied by vendor, if not, order one).
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