there is
e-liquid that you buy off the net that is already made, with flavors and nic added or with no nic, etc. Each site that sells e-liquids, have their own flavors, and depending on who you order from, IMO, they all taste a little different, others say they all taste the same or they can't taste certain flavors .
Things is, Taste buds begin to heal after a month or so of not smoking, (some even sooner)
then there are the e-lqiuids that people make themselves, some use PG, some use VG, some use both,
You can buy unflavored nic liquid and add PG or VG to cut it to make whatever nic amount you want, and mix in flavorings like Loran's or FaeriesFinest flavors, to make the flavors you want, and as strong as you want. Some
e-liquid you buy already made, is weak flavored, so alot of people make their own. It's a good way too if you want 0 nic, or want to step down nic levels over time.
It's also alot cheaper to 'do it yourself'(DIY) liquids.
I know myself, it seemed at first, like it would be hard, but all you do is use and e-juice calculator like the one found here,
eJuice Recipe Calculator Just type in what you want to make, and it tells you how much do add. I just make small amounts at a time, like 4 or 5 mL small bottles, and the calculater puts the measurements into drops amounts. So alls I have to do, is count the drops into one bottle of each ingredient. Pretty easy. And saves alot of $$
And also some people have allergy to PG, and switch to VG, (Vegetable Glycerin) which is more natural, and produces more vapor. I know myself, I had problems with PG bothering my throat, so I switched to VG and it took care of that. I also had a really dry throat all the time using PG (which is what most pre-made e-liquid's that you buy are, unless specified) VG took care of all of that. =)