The junior stuff is the UK & Ireland. It's shorter, so it pays less. Some only 13 hours for a "3 day". The longer stuff like Berlin, Rome, Athens, pays more because it's longer and will be up to 20 hours for the 3 day. The 767 pays more because it's a widebody. IRO can suck if you are not in first class. Be careful with the IRO stuff. Sure you're paid widebody FO pay as IRO on the 767, but do you want to spend 8 hours sitting in coach flying there and 3 hours sitting in coach flyingh back. Widebody IRO can go more senior than some of the good FO trips on the 757 due to pay and destination. As IRO you will never "fly" the airplane, you'll do the takeoff and landing in the jumpseat. You are "third in command". IRO is not bad, if and when you get a first class seat. One has to be open for pilots to get it. No IRO's to places like Ireland, Lisbon, and most UK destinations- flights under 8 hours each way (or scheduled to exactly 8, even though it always takes longer).

The Euro is great compared to the Kroner and Pound. The Euro sucks, but isn't the worst currency you'll see. I took my own food to the UK, Oslo, and some expensive cities like Geneva. Top Ramen and hot water from the coffee pot in your room. Canned tuna. Trail mix. Living the life of a real airline pilot!

Some hotels are good and some are not. European hotels are different than in the US. All rooms are small and can be like closet (even the real nice hotels). Manchester is an exception, some of the rooms are huge and some have 30-40' ceilings. It's an old insurance building converted to a hotel. It's like the Winchester mystery house, if you've ever been there. Air conditioning is rare. I've been in hotels without air in 90+ degree weather. Fitness rooms are rare too. Although some have really nice fitness room, most have nothing. Coffee and irons in your room are standard in the US, but not Europe. Some have it and some don't. Some you can request an iron, but some you have to pay for ironing services. I just wore it wrinkled.

I just spent two years on the 756 flying to Europe and I enjoyed it. Mostly because I had never been there, so everything was new (I had flown 10 years domestic) and I played "tourist" everywhere. The red eye flying sucked, but the pairings were commutable. You are fatiged most of the time as an international pilot. You land at 2am Eastern, but it's 8 or 9 am in Europe. You've been up all night and now that it's morning and everyone's getting up, you go to bed. But if you sleep 6-8 hours or more you'll be up all the next night and be tired when you have to fly back. I just took a couple hours nap when I got in and then got up and out. Then I stayed up until almost midnight in Europe, so I could sleep until my wake up call to go flying.

Some people don't like it and some would never do domestic again. To each his own. Have fun.