Part of the fun of the newbie stage of vaping is all the fun you can have buying, sampling and generally tweaking your preferences until you have an experience that suits you...I started on the Apollo Extreme e cig. Like the company and their service, so I kept using them. Their starter packages are pretty mid range on the $$, and generally very good quality, IMO.
Anyway, for me I went from pre-filled cartos to blanks and juice, then couldn't shake the feeling that I wasn't tasting my juices fully. Tried the CE4 for TGo clearo (because it fits on the Extreme battery)
Looked pretty janky, but I liked the cleaner taste of the juices. Long story short, I leveled up from there to 2 EGo superior batteries (from Apollo) and 2 BCC EVOD clearos, also through Apollo. I use one for tobacco flavors and the other for fruity/other flavors, and I'm really happy with this setup currently. Can't say enough good things about the EVOD. No leaks, nice flavors, good capacity.