Off ramps are tricky. You never really know what you are going to find at the bottom. I tend to take them a bit easier.
On ramps, on the other hand...
All things being equal, they lead here very often on to an unlimited section of Autobahn, and it is in your interest to hit it (the Autobahn...) already doing a respectable speed.
Except if you have to tuck in behind a truck (speed limit 80 km/h), or there are road works, or there is a traffic jam, or there is lots of traffic and you have to juggle to get in, or....
So yes, I enjoy (on) ramps that I know, but always with a bit of reserve for unforseen circumstances.