My favorite is the 6.60 that runs every Sunday at 1pm my time (east coast US) with a 25K guarantee, it is by far the best value of the week. In fact, I cannot remember the last week this tournament actually met the guarantee, it is usually about a 5000 dollar overlay which basically means the prize pool is always even larger than it normally should be, which is why the value is unsurpassed. ACR is quite generous to keep the 25K guarantee on this one. Shhhh. Don't let them know!!
Of course, great value in tournaments also means it comes with a very large field size, and specifically for an ACR tournament, it also comes with a very long late registration period. However, its now 4-hours-long which is better than it used to be (5 hours). Most weeks the time flies by for me, I don't mind the 4 hours, I just remember to always be patient and try to accumulate chips without undue risk.
I'm a freeroll player, basically, I am blessed to have won enough of a bankroll playing the freerolls to be able to afford to play the 6.60 25K each Sunday, it is the highlight of my week! But the daily highlight of each day is the Cardschat freerolls, I play on both ACR and BetOnline too, love the daily challenges with a much smaller field size!!