Virtue in the eyes of the average human

Which is more virtuous: to be grateful for what you have, or be forgetful of what you don't?

Is it neither?
Strangely, perhaps there may be a time and place for neither, from what I can surmise.  I feel like at certain junctions, the only way to evolve beyond ourselves is to focus on what we could have in the way of strengths and capabilities, rather than what we currently possess.  It's certainly a noble goal to pour our hearts into becoming stronger lovers when we fight, or better winners/losers.  The power of this concept can be amplified when we see others possessing these defining characteristics that we don't currently - yet should rightfully - posses.

OK, but...
Supposing that the appropriate times and places to "ignore" these virtues are limited in nature, though, and must be executed in the pursuit of noble outcomes, I think we find ourselves in a society where we're pushing them away in a rampantly inappropriate manner.  Some would argue that this is natural, as humans; our vanity drives us to take our temporal gifts for granted and our envy moves us towards anger over those that we lack.  Yet regardless of where you stand on the debate regarding whether or not we - as humans - are inherently good or evil, it can't be ignored that those tendencies are extremely real.

So whose fault is it?
This may sound really crass, but I'm honestly starting to feel like it's too ambitious to expect the average person to be able to practice the two concepts on a consistent basis.  In our culture, which enshrines the notion of individualistic achievement as a noble approach, we simply haven't built the appropriate motivational frameworks to stimulate humans in a way that makes them grateful for their good fortunes and ignorant to the voices of envy. To top it off, the spiritual will then suggest that this is where humanity needs God to step in, to remind humans to be cognizant of their sinful tendencies and teach them how to live in a manner that rejects them.  Yet when stated like that, it almost seems like religious constructs remain to simply fill a void that we, as humans, have been too foolish to fill for ourselves with humanistic equivalents such as ethics and reason.

So in the end...
I think humans have the innate ability to practice both, without the support of the metaphysical, assuming we could create the appropriate environment that would foster them.  And to answer the initial question, I think they're equally important.  The critical job remains, however, of making them relevant to the average Joe.