Well, this is a good question.
I've read 2
poker books from Dan Harrington (tournament
poker strategy 1 and 2) and I'm familiar with
odds, with positions, with ranges, with many things that a fish might not be familiar with, but I wouldn't say that I'm a shark.
I usually go in all-in situations with the most likely hand to win and I make racional decisions on how much should I raise or call.
All I could say is that I'm a clever and hard to catch fish at the pokertable. I eat many-many smaller fishes and I'm rarely outplayed but that happens, especially under pressures at the final tables.
On a rate from 1 to 10, I'd give myself around 6.5 - 7 on how good poker player am I.