1.You've flown RyanAir so many times that sitting in coach on any other airline feels like first class.
2.You can't imagine a vacation where you don't pack your own towels and pillowcase.
3.You've mastered the art of staying out until 5 a.m....
4....and still waking up in time to snag the free hostel breakfast.
5.You've got Xe.com bookmarked, and your most frequently used app is your currency converter.
6.Words cannot possibly express the lifesaving qualities of this bad boy.
7.And this one.
8.And this one. Party on the Eurostar!
9.Speaking of... You're skilled at sneaking your way into higher-class seats on international trains.
10.You've run out of passport pages. Again.
11.You know how to change into your PJs, settle into bed, and get dressed in the early morning using only the light of your cell phone — to keep from disrupting everyone else in your hostel room who's sleeping.
12.You have, like, 70 million of these.
13.You know how to ask for directions to the bathroom, train, and airport in roughly 30 languages.
14.You take the phrase "packing light" to an entirely new level.
15.You can convert Celsius to Fahrenheit and vice versa without the help of the internet. Same goes for metric system to U.S. units of measurement.
16.You sign up for every free city tour available — then head to the bar with the coolest people you meet there when it's done.
17.If you're ordering a cocktail outside of the U.S., you know to ask for "a double" if you expect anything remotely near the strength of what you'd normally drink — and realize you're better off just getting a pint.
18.(And if the night ends with a one-on-one party in your hostel room, you're a pro at keeping things discreet.)
19.You know how to negotiate at markets like it's your damn job.
20.Street food is perfectly acceptable — nay, preferred — for lunch AND dinner.
21.You're well-versed in the many name and flavor variations of your favorite snacks across the globe.
22.You know which credit cards don't charge foreign transaction fees and which ones offer the best rewards for travel.
23.Whether or not there's an airport shuttle bus to and from your accommodations is make-or-break in deciding where you'll stay.
24.You can't relate to the agendas recommended by most travel magazines and travel sites because you are poor.
Hahaha renting a car.
25.You basically live on Couchsurfing.org and Hostelworld.com.
26.But you pretty much have a free place to crash anywhere on the globe after meeting such awesome people in all the cities you've visited!
27.You can't be in one place for longer than a month before extreme wanderlust sets in.