well, when i first started my cycle, which was only cyp, i was sleeping, eating, and lifting like a maniac, god i wish i felt that way now... when i laid down in bed i was completely knocked out in a matter of minutes... then i started using enanthate and im not as tired but i can still sleep well... i can kind of understand what you mean by cyp possibly making you sleepier than most... but i mean it could be almost anything that makes you more tired... diet, mood, your overall day, etc...