I want there to be some level of customization for the jobs. They don't have to be big elaborate 40 point talent trees, but right now our Chocobos have more depth of choice and customization than the main jobs in this game. I really hate to use WoW as an example since it has a tendency to completely derail topics around here, but I like what they did with talent trees in MoP.

There's always going to be a best choice for certain talent tiers, but they've come a long way in letting players pick the talent that best suits them or the situation. As an example I main a Blood DK and I get to choose how I regenerate resources.

Cross-class abilities just don't offer any real level of customization because in most cases they are either mandatory due to lack of other options or completely useless i.e. Hawk's Eye on a caster.

Before you jump down my throat, I'm not asking for SE to bring WoW style talent trees here. I simply want any level of customization at this point.