One Eye Open
You can sleep and keep watch at the same time, which is creepy but effective.
Benefit: Instead of taking the normal circumstance penalties to perception checks while sleeping, you only take -2. In addition, you get a +2 bonus on saves against spells and effects that cause you to lose consciousness.
If this feat or something similar already exists, I couldn’t find it. I love the idea! A great option for rangers or rogues, with their propensity for being alert. Perfect for anyone who wants their character to be the consummate sentinel.
Have fun being creepy and effective!