I like all different types. (that's what she said? haha)
I enjoyed the big 64 player matches back in the day...even 70. Sometimes I'll even go into a smaller match with 24 people. Just depends how I'm feeling. I loved the 70 person matches on maps like field, Under, City Flying, Desert Siege 2 etc. I say you cap the limit to 64...and if people don't want to join big matches...well, its a personal problem!