I've been mixing my own for a while now... and I only use flavors from ECF registered vendors. Some are awesome, some are so-so... but none are untried. In other words, I'm not being a "guinea pig", you know?
+1 to the above posters... read up in the DIY threads. No need to go experimenting when others have already done it, right?
Here's my latest fave:
In a 10ml bottle mix the following....
2.5 ml Nicotine Juice (100mg) from xtremevaping...
1.5 ml "Milk Chocolate" Signature Flavor from ecigexpress...
0.5 ml Lorann "Creme de Menthe" (from numerous suppliers, I think ecigexpress has it)
5.5 ml pure PG
end result is 25mg strength 'Andies Mint' (remember those little wafer mints you could get at the cashier's stand in a restaurant for a nickel?)... and it rocks. Doing it yerself is awesome, you can tweak it however you want, and experiment all you want... but I would highly recommend you only use suppliers for nic and flavoring that have been around for awhile. Unless you really want to be a guinea pig.