User Waveform Strategy + Success Stories

For those of you who make a lot of use out of loading your own waveforms, what has been the most successful?

Are you liking simple analog waves that you can layer / detune, etc?

Or are you liking using more complex stuff; intervals, FM, actual instruments?

About to dive in but wanted to narrow my focus a bit for my first experiments.

I’ve made lots in Audio Term, basically just drawing in waveforms, previewing them, and saving the ones I think has the most character. Audio term is ace for it.