Robert: Welcome aboard! Regarding loop composing, one effective technique is to set up slight variations with volume and filter envelopes. It's very easy to simply let a loop chug away without evolving, but that can grow boring quickly.
Similarly, try muting sections of loops to open up some space in the arrangement. Today's multitrack audio programs make it easy to create huge layers, but that gets muddy and it's hard to know what to focus on. In an earlier interview, BJ spoke of reducing his compositions to a tiny ensemble. If the theme worked on, say, piano and drums, he'd know he was on the right track.
The "Support Our Loops" chapter in my book (www.ArtOfDigitalMusic.com) has more ideas. Look up Francis Preve's (www.fap7.com) books as well. I hope to interview him in an upcoming episode.