I'm literally on ECF hours every day. I enjoy continuing to learn about this hobby, and helping others with what I do know already.
Concerning flavors, yeah, I probably have at least 30 flavors in total. Most of them samples or tiny trial sizes (thank goodness). There's 3-4 that I use on a daily basis, and another 10 that I reach for when I need a little variety. I've found that I like a good coffee flavor the most, and to a lesser degree some fruit flavors.
I think that I have been wise to read the two juice forums here on a regular basis. I try to get idea on what flavors I might like to try from reading them. Once I decide, I do try to either order a sampler or 2-4 trial size bottles so as to not waste too much money on flavors that I won't care for. I can always order more in a larger size if I like it.
I don't drip, so I use ce3s to test out new flavors. These are small capacity, re-usable, and inexpensive. They do go by different names depending upon the vendor.