I only had the one DE, the Merkur Futur for ~2 years until I found this place. Then I went a bit nutty with acquisition, but it's now stopped. I rotate through them approximately once per month (February's is the Tatara Masamune):
Merkur Futur
QShave Merkur Futur Clone
Weishi Nostalgic 2.0
Rockwell 6C
Karve CB Brass
Tatara Masamune
Tatara Masamune Nodachi
Merkur Futur
QShave Merkur Futur Clone
Weishi Nostalgic 2.0
Rockwell 6C
Karve CB Brass
Tatara Masamune
Tatara Masamune Nodachi