I'm glad you found something you like. That is the biggest challange.
There are a huge assortment of text editors and word processors available for the iPad. As you've experienced, the hardest part is deciding which one is the best for you. I've tried several, and like serveral, but most of the time Notes is enough for what I need.
When I do need more, it's usually because I have to edit a Word document. Then I use the Microsoft Word app.
I rarely use Pages these days, but prefer it if I need to quickly create a flyer or other one or two page document (that needs printing) and don't need to share it with others (who mostly want Word documents). Page's layout tools are easier to use than Word's (at least in my experience).
When working with longer text documents that will be shared online, I prefer a dedicated text editor with more oomph than Notes, but without the extra bagage of Word or Pages. I use Byword most of the time, because it has decent
MarkDown support. When I need .rtf instead of .txt I'll usually turn to Textilus (though I haven't used in so long that I had to redownload it today).