I've often compared the hobby aspect of vaping to fishing.
You can have an absolutely wonderful experience using cheap, off the shelf hardware, or you can complicate theout of it, depending on how far you take the custom gear, tying your own flies, etc.
I buy the best hardware I can afford from reputable manufacturers (smok, sigelei, Aspire...) but I haven't gotten into the DIY stuff.
Why fix something that already works?
I recall my dad telling me that fancy fishing lures catch more fishermen than they do fish.