Awe man, not fair to have Drum Sampler in there, because I almost always resample EVERYTHING to a drum sampler. That would be my vote, but I’ma keep it to the Synth engines and vote for FM. I use the Sine Wave properties of the engine ALL the time, and you can get some nice crazy stuff too.
DNA, cause it’s craaaaaaaaaaaaaaazy
I was a bit hesitant to include either sampler but since sampling is a staple for some, figured I should include them.
i kept w/ the synth engines too and chose cluster. i think i prob use dr. wave the most, but i love the fat pads & detuned sounds u can make w/ cluster!
hmm its hard to narrow down. but i love the oddball string sounds i can get from the string synth. that coupled with the effects is quite pleasing to my ear. but i love them all. DR WAVE so easy so fat.
o shit i forgot d synth!
I feel so sad for Phase!

Dr Wave and Pulse by far, then FM. Drum Sampler is great too though, I find use for most of them except Phase which I think has a horrible tone I think it actually needs a revision as Phase Distortion can sound much less nasaly and better.
Strings is just amazing, but I said Dr. Wave, after all the experimenting I did with it for the Battle 24.
Love the DSYNTH once I got used to it. Strings a close second.
Phase really needs to be run through a filter to take off the excessive high frequencies; after that it can be pretty nice.
phase is the blue one w/ the modulation? or the one w/ the 3 waves? i always get those two mixed up in my head.
I actually voted Dbox when I first got my OP as it tickled me so and I love drum synths. But for keys Cluster is a very nice engine. Also got some decent bass with FM(combined with Punch bass enhancement) and motorbike/lawnmower type bass with DNA.
Try DBox with about 4% random LFO.