Been to 121' once and felt no real evidence of narcosis. Some people are more affected than others. Apparently, I'm pretty good at holding my nitrogen-liquor.
I frequently dive 100+' and feel the same as at 30', and I know that I am not as affected by narcosis as many people are, because when I took my AOW course years ago, my instructor had me solve a long-division problem on the surface, and then a very similar one at a depth sub-100' and my time on the one at depth was only 2 seconds longer than on land.
The only thing about diving deep that I've noticed that frequently gets other divers in trouble is PAY ATTENTION. Pay attention to EVERYTHING. How you feel, how your buddy feels, your air, time at depth, depth, Po2, EVERYTHING. Things can get very bad, very quick down there. And always, always dive a more conservative profile than you think is necessary.
But there's no reason why you should feel an obligation to go deeper if you don't want to. Trust me, you're not missing a whole lot by not diving that deep.
Seeing the Oriskany is not worth it if you're uncomfortable with the dive profile
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