I can not comment on being a Seal, but there are a few important considerations that one needs to consider before joining. Having served in a Special Forces Group, I know that is is quite satisfying serving with elite highly motivated indviduals. Participating in a war has a large cost to individuals that has not been mentioned. Psychiatrist and PTSD authority Dr. Shay writes "The painful paradox is that fighting for one's country render one unfit to be its citizen." If you look at any objective measurement-incarceration rate, suicide rate, divorce rate, drug abuse rate-you will find that vets are many times more likely to end up never being truly happy again. I have mamy fellow vets who have chosen suicide to end their suffering. I came back with a blackened heart and was lucky to be able to remove myself from society for a few years so I escaped being incarcerated. (The largest Veitnam Veterans of America chapter in Ill is at Hill Correctional center) After 25 years I even progressed to a point that I could shed tears. At this early stage it is reported that 20-25% of returning Iraq vets seek mental help. That figure will only go up. I bummed around with a bunch of Iraq vets this summer and bonded with them. They had it much tougher than we did in Vietnam in my estimation. Their tales about their experiences in Iraq tore my heart out and were similiar to ones that I told. Most all do not want to hear these stories as they disrupt all the myths about the glory or war and the glory to the US. As Chris Hedges writes "war is always the betrayl of the young by the old."
Don't take my word for what you may experience in war, read the following books that accurately portray what some of us anyway went through. Homer's "The Iliad" Chris Hedges "War Is a Force that Gives Us Meaning" Edward Tick's "War and the Soul" Lee Burkins(who served in the same SF group that I did) "Soldier's Heart" Ambrose Bierce(the only major writer who actually fought in the Civil War. Read Lt. Col Grossman's "On Killing" before you join.
Read the war poem written by Wilfred Owen before he was killed in WW1 "Dulce et Decorum Est" in which he writes
"My friend, you would not tell with such high zest
To children ardent for some desparate glory,
The old Lie; Dulce it decorum est
Pro patria mori."
(latin for It is sweet and right to die for your country)