Depends if it's water or Wine !!!!!!!!!!!

I see both wherever I go...as Roger D. Mucci points out...it is called realist

As an engineer, I see it being twice the required capacity and an improper utilization of resources.

In my 20's I'd have said: "Barkeep, fill 'er up!"

Regardless of the amount of liquid at any given time, it is refillable!  

My glass is normally full...No half a$$ stuff

I'm a realist. If the glass is half-anything, someone needs to pour more wine.

To me, the glass is half full. When I ask for a glass of water, I don't ask for a half a glass of air. I look at things how they are, and any decisions I make is based on weither I can live with the negatives. The positives are ALWAYS easy to accept. If I can live with the negatives, then I will do it, but if I can't, then I don't do it. I'm always positive otherwise. Who wants to be negative all the time?

I am just a realist and happy if there is anything in the glass

It depends as to what is in the glass.  A

Interesting, and for me, actually both . . .  sometimes I give the benefit of the doubt (glass is half full), and other times I have no patience (glass is half empty) - HA! Jack Lewitz 

I'll second Roger D. Mucci answer.

I like to think I am an Optimist, and always want to see the sunny side of everything.  

generally work hard to be optimistic.

Jack Lewitz In this business you better be an optimist.

Roger Mucci has the right attitude! Refill the glass!

It's all about perspective.  

Full of potential, and I make the best of it. 

Always half full! I always see positive in people or in any situation and focus on that. 

It depends upon the situation.

You said it Jack Lewitz - it's always full!

Half full! You have to be optimistic, especially in the world today or you will become overwhelmed with all the negativity about EVERYTHING!

My glass is usually 2/3 full at least!

I'm a cockeyed optimist...

I re-fill the glass.  I got waitress experience in college

Jack,
Half full??? Are you kidding???

My glass is always 200% full. Life is great and I can’t get to half of the fun and profitable things I would like to do.

It's always half full. 

I feel a lot happier when I see the glass half full.

My glass is half empty and I like to keep filling it up before it gets to the bottom.

I've always said I'm an optimistic pragmatist.  

It depends on the size of the glass.

It really depends on what is in the glass. If it is empty, I will fill it.

Cool answer Jack Lewitz 

Always the optimist

I see that the glass in question is too big.

Like Rodger, I am a realist

1/2 Full

Glass is always half full if not completely full.  An optimist always.

I am a realist

Half full always

I have seen and made seemingly impossible things happen, but mostly because I have a habit of looking down the fairway about 30 moves and anticipating worst case scenarios. I'm not sure that qualifies me as a pessimist, but as a realist. And a magician. 3:)
Maybe just a broker. Ha

For the most part I am an optimist, but life has taught me a few realities that are not always positive.

In your graphic, the glass is simultaneously half full and half empty.  A perfect equilibrium.