Classes or the lack there of

So something I've been pondering about in the rule set that I've been cooking up. Class or classless? Classes really are straight forward and make building and leveling easy. Classless allows for easier customization, and concept building. I'm leaning toward classless with a play selecting choices appropriate to the concept. Playing a soldier pick soldiery abilities and skills. It also allows people not to be straight jacketed to a single thing. Soldier or thief. Where classless would allow you to play a soldier that used to run the streets and knows how to pick locks, or whatever. Seems like it would give a bit more freedom. What do you folks think?