1)Must use all original sounds, painstakingly designed or manipulated, so that it sounds like nothing else anyone's ever heard.
2)Use presets, samples, or recognizable instruments without worrying about if the sounds are unique, but concentrates on the actual composition/arrangement.
3)Inbetween the two. Use the sounds as they are, unless can't find a preset that suits a particular part of the arrangement--then design/tweak a sound to fit the need.
Now, it seems especially in the arena of electronic music, there's a heavy emphasis on sound design/manipulation. Sometimes I wonder if it's a little over the top. We've all heard the lot of the trippy sounding stuff that just grates on your nerves instead of being good music (of course this is subjective). In cases like that, it seems sound design was placed before actual composition/arrangement.
My personal disposition is that the countless commercial presets, user presets, sample libraries..etc out there are more than enough to make incredible music. You can sit for hours, days, or months and try to design your own sounds, but the truth is, you are not a professional sound designer, and you are not paid to design sound like the professionals are. The pros know what they're doing and they are very experienced at it. The chances of you designing a sound that exists in no available preset/sample library, and sounds better than any designed sound that came before it is...well, quite slim. So, why slave over the concept of designing original sounds?
Or, maybe it's just a matter of degrees. You can take a preset sound and tweak some parameters so that it fits closer to what you imagine in your head. Or, you can be a real tweakhead and start off with just a waveform and then go wild. I suppose in the end, we make music for different reasons, and our motivations are all different as well. I guess for the tweakheads, the process of making the trippy sounds is alone worth the price of admission--whether these sounds can add up to a good piece of music is another matter altogether.
