There's gonna be a lot of sitting around waiting. They'll get you up at probably 3am and you'll probably get to MEPs about 4:30 or 5. And you'll maybe get done by noon. But you'll probably find yourself sitting for an hour or so here and there waiting for your turn for stuff. But get used to that. The military's all about "hurry up and wait." If you join, in your first year you'll learn how to sleep for 2 hours, then be up for 20, then have to sit still without falling asleep for another 4.
Now, the physical really isn't that bad. They make you move your body around in weird ways to make sure all your joints work. They check to make sure your spine and bones are shaped properly. They do a hearing, vision, and depth perception test. They record any markings you have on your body (moles, tattoos, scars)... They do a drug test. And they draw blood to do labwork. I think that's about it. (oh yeah, and they do a visual inspection of your butt hole :o)
If you haven't already taken your ASVAB, they'll have you take it (most people take their ASVAB earlier, so they can be talking about jobs with the recruiter ahead of time).
Once all their testing is done (physical and mental) they are going to present you with jobs. Like Wookie was saying, they may try to push certain jobs on you that they want filled, but remember at this point, the power is still in your hands to turn around and walk away. So if you keep negotiating with them you have a good chance of being able to get what you want (especially if your ASVAB line scores are good, and you passed all the physical tests with flying colors), try and use that advantage to get a decent signing bonus (I got $5000).
Remember two things (which they should make abundantly clear to you anyway).
1) If you're expecting anything out of your agreeing to join (ie bonus, a specific job, or posting to a specific location), make sure they show it to you in your contract before you sign anything. If it's not on paper, it was never promised, and you're not going to get it. Bottom line.
2) Once you sign the papers, you lose your power. Make sure you're getting what you want out of your enlistment before you sign. You can't sign the papers then ask them about an enlistment bonus. It aint gonna happen. But if, before you sign, you bring it up (and make them put it in writing), you've got a good chance of getting a few thousand for your committment. It's not wrong to get what you want out of this deal. You're basically giving your life to the government for the next 4 or 5 years, so make sure it's worth the cost.
If you choose not to decide, you still have made a choice.
Lassev: I guess there was something captivating in savagery, because I liked it.