I am a minimalist type of guy, but I am attracted to units that offer flexibility.
For example, I will plug straight in to my Ampeg SVT 5Pro, and use just the clean channel most of the time. So it's just one unit, but I appreciate the ability to blend in some overdrive once in a while, or play with the power configurations that the amp can offer (when playing with multiple cabinets, mono-bridging, etc.).
Same thing with my VT Bass DI. One very simple unit that offers much flexibility ie. DI usage, stompbox overdrive usage, etc.