I think my end goal would be deep decompression diving. Like wrecks at 250' or something like that. I find deep diving very appealing! I doubt I'll ever venture into caves. They just don't appeal to me. I like the ocean! I was thinking of doing both PADI AOW and GUE fundmentals eventually, PADI rescue diver, and I'll probably do some TDI or SDI courses too for solo diving. Or maybe PADI tech training and then GUE tech training and the TDI tech training. Not necessarily in that order. Money is not really an issue, I have a large scuba budget. I figure why not just take ALL the classes?!
That's not a bad approach ... there's a lot of value in taking classes from different instructors and different agencies. My only advice is to not get too hung up on depth ... it often leads to people going deep before they've really acquired the skills and experience to understand and mitigate the risks ... and those do not increase linearly with depth. 250 feet is exceptionally deep, and requires skills you probably haven't even heard about yet. Even with tech training, you should take it to that depth in measured increases.
I only bring that up because access to deeper dives is one of the major reasons why folks want to take AOW ... and although it will expose you to somewhat deeper profiles than OW, it in no way prepares you for safely and reliably preparing for deeper dives ... not even, in many cases, dives within recreational limits. A well-taught deep diver specialty will do that way better ... followed by an Intro to Tech or Advanced Nitrox class. Also, understand that while the GUE Fundamentals class is an excellent way to get introduced to the concepts of tech diving, you will NOT be doing any deep diving in that class. In fact, the majority of your diving will be in water roughly equivalent in depth to what you used for your OW class. The focus of skills, however, will be miles above anything you've been exposed to up to that point. It's a class I highly recommend, given your stated goals ... but it will not take you deep.
Maybe 150 or so and no they've never seen me dive.
That's a little unrealistic ... I teach a NAUI Advanced Scuba Diver class that's way more rigorous than anything the agency requires, and my rule of thumb for students inquiring about entry is that they should be comfortable performing the skills they learned in OW. My rule of thumb is about 20 dives post OW ... enough to gain some comfort in the water with your buoyancy skills, and to have practiced the basic skills you were introduced to in your OW class. The exceptional student can probably do it with just 6 or 8 dives.
But as some have pointed out in here, a lot of AOW classes are designed to be a logical add-on to the OW class. If you should wait too long, signing up for one of those will leave you feeling like you wasted your time and money, because you will have already exceeded the goals of the class before you begin.
So-called "advanced" classes can vary from agency to agency, or instructor to instructor. Find out what the goals of the class are by consulting the instructor you're considering taking it from. Compare those to your personal goals and find out if there's a good fit. If not, keep looking ... you may discover that AOW isn't really the class you're looking for at all ... and perhaps the GUE Fundamentals class would be the better choice for your next class.
I'd also highly recommend you take the Rescue class ... it's the only class I really think everyone should take post OW. Someone said earlier that you need AOW to get into Rescue. That used to be true for some agencies, but I believe they're all pretty much gotten in-line with the idea that you don't need the Advanced class prior to Rescue.
Essentially, AOW gives you some access that you won't get without it. The relevant question then becomes, if you get the card and have the access, did the AOW really prepare you for the dives you're now allowed to do? Since your goals tend toward deeper dives, that's a concern ... and one only you can address. Depending on how it's taught, the AOW may or may not be a good choice to pursue that path. Here's an article I wrote some years ago for folks like you who want to pursue deeper diving ... it might give you some things to think about.
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... Bob (Grateful Diver)