1) Thanks for your time and consideration.
2) I will be looking forward to your reply.
3) is an extra
4) I am also a "people person"...1) Thanks for your time and consideration. If you want an advice: drop it. I have seen it in a sample but I don't think it is very helpful.
2)I look forward to hearing from you. In my opinion this is the best ending and I use it all the time. I will be looking implicate you are not quite sure. This is not the appropriate tense, if you are sure. I see no need for 'will be looking'.
3) If you want a better ending insted of
'with a good..': I would welcome the unique opportunity to work as part of your successful team, to benefit from your extensive experience, and to put my training, experience, creativity and enthusiasm into practice for XYZ. Or something like that:-)
4) My social skills are excelent as well as my ability to understand foreign cultures and to adapt to them. Please drop ''people person'', there are other ways to point at your social skills.
5) Sorry but the letter is extravagant and not in a good way. Maybe you should make it more formal and close to the letter they usually receive. Personaly, I don't like the structure. It should have the following structure:
a) Introducing: Why am I writing. 1-2 sentenses.
b) Main Letter: Why am I the wright person for the job/the scholarship. Very important: do not repeat your CV. Use the CV to show, what have you done and your advantages but do not simply repeat the CV. This is a very important distincion.
aa) My education, expirience etc.
bb) My skills.
c) Ending: 1-2 sentenses.