Another forum i just posted got me thinking about this concept.
Is 5 card draw or holdem better?
I came to the conclusion that there are several factors to consider when making a decision.
The number one determining factor is experience. If you are more familiar with a game, you would most likely conclude that it's better.
Another factor i might consider would be my mood. If i am in a mood where i am willing to play more aggressive i might choose a game of omaha hi/lo vs a game of holdem.
Even furthermore, i might chose a game of limit holdem over nl holdem if i feel like playing it safe.

This posed the question for me, Should i play a game of holdem vs omaha or razz or so on etc. depending on the mood im in, or the style i wish to play.
I imagine omaha to create bigger pots because there are more chances for someone to make a better hand.
that is why i think there is more risk and should be played when you would like to see more options for a hand.

For example if i play holdem, i get my two cards and decide whether or not to call for flop
if i play omaha i may want to see more flops becuase the possiblility SEEMS better to make a hand
Thats why i think there is more risk and might should be considered when choosing a game depending on your mood or even your budget. but the budget is a whole nother story