Flawed frames (like my '84 Trek 520 with it's earthquake-damaged top tube) are actually the most enjoyable for urban or semi-urban riding, because the rider can more freely secure the bike and go about one's business.

Nicer bikes, you might feel more time-limited in your off-bike routine, since there is so much more value that could be lost to a theft, and perhaps more motivation for said theft to occur.

Totally depends where you might want to park it, and how easy it is to find an inexpensive suitable replacement in your region.