The Feel Good Factor: The External Variables

Sometimes I feel that I should have been a Happiness Consultant rather than a Growth Consultant. No I am not claiming that I am eternally in the bliss, but I think my funda about being happy is sometimes good. ( A growth consultancy service provider itself is not perennially on the growth track ..Right??) or (A strategy Consultant does not always get his/her strategies right :) )
So what are the variables that makes one happy. Frankly the question is absolutely subjective. While you and me might be happy gaping in a Goa beach , she might not :). Got the twist!!!
So, let me quantify my feel good factor (I need a consultancy fee for others). There are two broad groups of variables: Internal ( You can say random factors ) and External. It would be easy delving into the external factors first in this blog. The internal factors would be coming in the next blog. It is a different subject matter altogether.
I would first write down a few things that no matter what makes me happy (feel good is a more apt state of mind). Based on those I would try to figure out the variables.
1) A room with my keyboard. And a few sad romantic, 'contemplating' songs. (Yes sad!!!)
2) A ground with a 2 meter high net and a round object called a volleyball with 11 others like me.
3) A long walk through metalled/non-metalled road crossing lakes, forests, paddy fields, (the environment has to be cool and serene)
4) A night out of random bakar with Sushil, Sushant, Gregory talking about the futility called Life, Music, etc... (The names are more figurative in nature)
5) Writing a good blog, reading it myself again and again ( I am a "Megalomaniac" to a few and they are correct...It is like the queen looking at herself in the mirror and enjoying her own beauty )
6) A long talk over the phone with some friend and giving him/her a nice speech on life, trying to set everything correct and then feeling good thinking I am such a philanthropist (God knows what they actually think of me..a pain in the a** may be).
7) Some good food by my grand mom (I am homesick :(( )
8) Jadoo Ki jhappi of my mom
9) Solving an intricate 'x' puzzle (x = Mathematics, Statistics, Finance, Physics, Economics)

.... Pause .......

Hupps.. I have taken a good 5 mins after writing the last point searching helplessly if I could find the tenth thing that make me feel good. The list is small. So the next step is to identify the variables.
Without getting into the reasons I am just listing the variables over here.
Feeling Good (me) = Function( external(music, games, walk, blog, bakar, fundas on life, grand mom, mom, brainteasers), internal (???))
So these variables externally create a complex interaction to make me feel good. Anyone thinks there might be some other forces at work as well??