Is it far or difficult to get from La laguna beach to Sabang? Does lalaguna still get really busy? I would like to do the DM in a pretty busy shop with a lot of diver traffic to learn about a busy centre and help lots of customers.? Tortuga. do you have experience with more DC in Lalaguna? I'm definetely going to check and email LLB Club!!!
It's a 15 minute walk or 5 minute banca ride from Big LaLaguna to Sabang, less from Small LLG. Sabang is closer to most of the dive sites, as most of them are in or east of Sabang bay - although it's not a huge difference.
Personally I like being able to wake up in the morning and be on the Sabang Wrecks (the closest dive site) 20 minutes later. Big LLG is fairly quiet, all the nightlife is in Sabang, although if you're on the beach there (where Capt'n Gregg's, Big Apple etc are) you're pretty much away from it anyway (well not far but far enough for it no to bother you)
IMHO more customers doesn't make for a better DM experience, rather the opposite. I'm not that familiar with any other ops than the ones I've already mentioned, although there are plenty to choose from (about 30 altogether) - but as you'll read/have read here on SB, the biggest factor is your instructor.
Generally the divide is down to personal taste; if you want to go out in the evening, it's much more convenient to stay in Sabang. If you want to stay away from that, Big LaLaguna