Poker's no fun on-line. It's hard to bluff. You can't see the other player's physical moves and look into their eyes before you bet or raise.
As an avid poker player, I agree, poker online is not poker, full fucking stop! It sucks the life out of it and makes it about nothing but odds.
There are two aspects of playing poker, knowing the odds and reading the players. And reading the player breaks down into a few aspects, with only really be able to be read online, that being how a person changes betting strategy due to position. For those of you are not avid poker players, if I have a King 10, a fairly strong hand in Texas Hold'em, how I bet will be different depending on where I am at in the order. If I am to bet first, I may limp in covering just the blinds and watch how others bet. If I am last though, I may choose to fold or go big depending on how others bet. This is obvious to any poker player, but reading the nuances of reaction is just not possible online and will alter how well you can read the situation.
For instance, if I am last to bet with a King 10 and someone goes in with a 5 times the blinds bet, a pretty strong bet for the first call, I may decide based on observation and prior experience he is bull shitting and double him up. This is a common tactic with a buddy of mine, betting high with shit cards. However, with someone else I play with, if he does this, he has pocket Aces or kings, so I know not to screw with him. Both bad tactics since they are so consistent with it, albeit the 2nd being better.
On top of that, good players change betting strategy throughout the game, and it is hard to know if they are doing so if you are not watching them. I do this all of the time and have become known as someone who can not be read since I change my betting strategy two to three times per game. I also never show cards unless I have to. With that being said, I did have one of my buddies read me in one big hand that I still cant get over. Unfortunately for him, he told me so, boasting about it. I let him relish in it, but changed my strategy instantly. If I were him, I would have taken my pot, said nothing, and bled him dry for as long as I could have.
Most of this is lost online.