OMG,pglemba. There are hundreds of good answers to your question. How adventurous and experimental do you want to get? You joined ECF more than a year before I did which leads me to assume that you've been vaping for a while. I dove into the vaping world last February and have been wallowing in it ever since.
Everybody gets into things to different degrees but I'll tell you where I'm currently at.
I liked 6 volts (Chuck) with high voltage 901 attys until I tried a 5 volt glv with regular 2.5 ohm cartos last summer which is awesome and the closest thing to the feel of smoking that I've tried yet. I just ordered an adjustable voltage Buzz yesterday so that may change. These things usually do.
I think I'll always love my GLV though.