If you find mainstream coffee enjoyable, by all means stay with it!

Homebrewed (lit.) coffee will definitely teach you to taste deficiencies in everything from restaurants to Starbucks, but if you don't already think they're there then it's definitely either cheaper or easier to just stay innocent.

My experience was out of frustration with what I felt was watery or burnt or too sugary. Homebrew fits the bill perfectly. YMMV, yeah?