I've been playing Apocalypse World in a few different groups, both as a GM and a normal player. While I love the game, I found defining Fronts a pain and therefore decided to only introduce them in the second session. And then I neglected them during the second session as well, and then the third, and now we've played for several sessions without using the Front system at all.
I have done my usual world-building stuff, planning of factions, geography and the like. We've had good fun. Incidentally, I've also found out that none of the people who has mastered AW groups where I've played have used the Front system, and we've had very fun games regardless.
However, I have this nagging feeling that Fronts, as structured in the playbook, could improve the experience. After all, I consider AW an excellently designed RPG and therefore I usually pay a lot of respect to any suggestion or rule in the playbook. I realize my usual style of mastering fills in some of the gap, but I don't know if I'd benefit even more from using the structured Front form of the playbooks.
So, experienced Apocalypse/Dungeon World players and masters, please tell me: are me and my players missing out when we're playing without Fronts?
EDIT: as I've learned, the Dungeon World Front system is the same as in Apocalypse World, and so an answer from the DW perspective would be equally appropriate.