For starters, I absolutely love the Traktor FX section, they are great all-around reverb and delay effects for dance music. If I need to add a bit of depth to a synth or bass, this is what I usually go for. I also love building my own presets, tweaking things like filters, phasers and flangers with the various modulation sources.
But also when working with the guitar, I like to take Guitar Rig as a starting point for my sounds. I don’t have the space for actually mic-ing everything up, and to be honest, I also prefer the flexibility of just changing presets when I feel like it. I record all my guitars through a DI straight into Cubase.
Pro tip from Eelke Kleijn: Tape Wobble is a great tool to make any synth sound vintage.