I choose a carry weapon for its ability to do the job. Here's my check list for that particular scenario:
1. Flawless reliability
2. Viability for intended purpose (in other words, can I carry it every day under normal conditions)
3. Ease of operation
4. Mistake proof design
5. Consistency in operation
How pretty it is, or how giddy I get when looking at it, are absolutely irrelevant to me personally. Sure you can train past almost anything, but under duress, I don't want to bet on it. I want the most simple, reliable, consistant tool at my disposal.