Be it thumb, long trigger, heavy trigger, half cock, decocked, condition 0, 1, 2, 3... What makes you feel safe with your carry gun? Is it as simple as just having a covered trigger guard? Within that, where and how do you prefer it? Ambi? On slide, frame, forward of grip or back? I like a 1911 style thumb, ambi. The lever itself matters little as long as it's got a good Ridge to catch easily with single swipe of thumb upward or down.