wow man... when I was younger I don't think my parents ever spent much more then $100 on me.
These days I spend more on them then they do on me.
A jet ski is just a waste of money, it will cost you money to keep it up and running and you'll probably get very little use out of.
A new laptop would be kind of useless, since you already have one and I'm assuming it's mostly just an internet machine. Keep your system clean and you can do a lot with it. My laptop is a PIII 733 256MB ram and 12GB hard drive, it's pushing 6 years old at this point and still works great, I can watch DVDs, it can run solidworks and photoshop (though it takes a few extra seconds to load) and it runs any internet application you can thow at it... unless you plan on doing some hardcore LAN party gaming it'd be pretty wasteful.
A new monitor would be good (21" LCD)... or an HDTV if you don't already have one (37" LCD)
A smoke V1.6... seriously? do you really need another Xbox
My personal opinion... ask for Cash... say you want to start saving up for a car... and this time next year you'll have that much more to spend on a sweet ride. Chances are they'll get you a gift anyway so you have "something to open"