Hi Winters, and welcome!
I've only been here awhile myself - but being the geek that I am I jumped right in and bought a joye 510 after doing a bit of research.
Don't sweat it, you'll find what works for you!
The main reason I think we choose the models that we do is so we have options. First & foremost, you can get juice in about any flavor you can imagine - Vs. the out of the box flavors (regular and menthol) and about any strength you can imagine. You can also choose from Propylene Glycol (PG) and Vegetable Glycerine (VG) or basically any combination thereof - depending on your preference!
Also, you can use an atomizer & cartridge, you can drip right on your atomizer, you can get a cartomizer, a tank - HUGE batteries, etc. etc.
Once you find the juice that you like, the PV (personal vaporizer) that you like, etc, Vaping is like a 1 - it's fun, it's pleasant, and as far as I can tell.... it's essentially a benign habbit. (OK, that's pushing it a bit.... but in comparison, it's WAY better than smoking!)
~Lazy