The benefits of becoming a Freemason vary from man to man, but in general I think it is safe to say that you get out of it what you put into it. If you are active in the lodge to an extent that you are included in charitable work, you will get a sense of satisfaction in helping your fellow man. If you participate in most of the lodge activities, through spending time with your fellow brothers, you will experience the sence of fraternal brotherhood that the lodge has to offer. You will meet many new friends and will establish long lasting bonds with the men in the lodge.
That said, I think that a better attitude to have when contemplating joining a Masonic lodge is to consider what YOU can offer to the fraternity and to your community. If you are compelled to join Freemasonry out of a favorable impression of the organization, a desire for knowledge, and a sincere wish to be serviceable to your fellow creatures, you have the right attitude to be a strong contributing member. There is no monetary compensation to be gained in Freemasonry. Any advancement in your career or professional life is infrequent and is usually an indirect result of being associated with and becoming friends with other like-minded men who have a strong desire to help others.
Freemasons enjoy no special rights not afforded to all citizens, and the benefits and priviledges associated with the craft are directly related to the level of attention and committment that you show towards others.
On a personal level, I can say that I have gained a better understanding of myself, more confidence as a public speaker, greater organizational skills, and much practice dealing with men from all walks of life.
I hope this helps answer some of your questions.
Dan Madore
Columbian Lodge, Boston