Tell me what would be your perfect blue blazer? What pockets to have? Ticket Pocket? Buttons? Etc.
I'm kinda fishing for ideas.
You can't go wrong with a two button, medium gorge, two vent jacket. Ticket pocket? Meh, nothing wrong with it, but it's personal choice.
I don't care for patch pockets but there is nothing wrong with it.
If you want it to be versatile, as you say, I would avoid any avant garde features like a single sleeve button (never liked that either). Here's an idea... How about peak lapels? I've always liked the look of them on a blazer.