OK although not a sifu (seriously! :p) I'd like to add my view... Usually I'd like to enter a tournament once a year. Although I agree with PM's comments above it does still to some point give you an idea where you are. Although many lin gung aspects can't be seen from just doing a form.
Otherwise, I'd like to go along with every tournament there is. usually to make photos and such, but also for the atmosphere. Even though forms might not be all that for before described reasons its still a martial event and theres always soemthing to be seen, new friends to be made, etc. This is my main reason to come along on such events. Its also a good opportunity to chat with people as theres less time for that during class.
That said, anyone from the forum going to Gevelsberg Saturday? If all goes well should be there too, its the one event a year I like to enter myself.