I'm with you. I love easy chord variations. I find that a lot of the tabs that I play from are very basic... designed to be simple to play and with the intent that someone will be singing over it. I don't sing. So, I like to embellish the chords and strum patterns to pick up more of the melody that should be there.
Also, it just sounds cool!
Little one-finger moves can get you from D to D6, D7, DMaj7, D7Sus4
Or A, AMin, A7, AMaj7... several variants of G and F. DMin and DMin6, DMin7
It's just fun to bounce around and add some variety, spice things up!