All of my pipes are straight, except for one barely-bent Rhodesian – I'm a holder. Like thick bowl walls, too.
I prefer the taste of smoke from tobacco that hasn't filtered too much smoke, so I like pipes with shallow, broad, tobacco chambers.
And I like classic shapes: Pots, Liverpools, Bulldogs, etc. But my "lumberpot" is a hybrid classic – lumberman stem, pot bowl.