I've begun to lean toward the MT, even though I'll use my Elio primarily as a commuter. I'm not that convinced that the AMT will be as smooth and trouble-free as the manual. Here's my rationale: because the trike is light and has a relatively low torque output, the clutch pedal needn't be too stiff. My Civic had a manual clutch and my Opel an hydraulic one, both were very soft with not much difference in operation. Yes, the manual clutch will require some left-leg calisthenics, but they shouldn't be particularly difficult, even for my ancient joints.
My second concern is for sitting at idle or creeping forward as in a serious traffic jam. Without a torque converter, something is going to have to slip, and unless the auto-clutch completely disconnects, it's going to wear. If so, when it re-engages, it will probably do so with a significant jerk . . . sorta like I performed when learning to drive a stickshift early in my driving career.
Finally, I'm up for some participation in my driving experience. I just can't develop a mechanical relationship with a slushbox. If I'm going to enjoy my commute, I'd rather get my kicks from the gear lever and clutch than poking at I <3 Radio on my phone. Maybe after it's all sorted out, I'll get the AMT on my next Elio.