chickdiver once bubbled...
This is actually a very astute observation. I am often apporached at various places by people who have questions about the gear, what we are doing, etc. Depending upon what I am doing when you ask me a question, there is a distinct possibility that I will be very focused on something, and not likely to answer with more than one or two terse words. It isn't that I (or others) are being intentionally unfriendly, but I (and cave divers on the whole, as well as many other tech divers) tend to be very focused, anal retentive people- everything has to be _perfect_ and done in a specific order. If I stop to converse, I throw off not only my pre-dive routine, but that of the rest of my team as well. Conversely, if you happen to catch me with questions after the dive, or when I am at the shop, but finished filling- I will likely talk your ears off about my particular passion. A lot of times it's just a matter of timing.