The Classic was great- they took that and ironed out the snags to produce the 744. It's a real sweetie. Some people initially try and fly it gently as if it will break- forget it is a big aeroplane at all when you are flying it and fly just as if you're still on an Airbus except for:
Taxiing- take great care- corners nice and wide, remember you can't judge speed so use inertial GS.
Flaring- do not try and judge by eye or you will pile it in- use the radio altimeter. Tiny pull at 30', listen to how the 20' is called then the 10'. You will then learn how much extra pull is required or if the gap between those calls is too long, don't pull at all. You can put it down without even feeling it.
Great redundancy is built in so at first it looks very complicated and bewildering. But they got the design right in all respects. Nobody who flies it dislikes it- it is the Queen of the Skies and I'd like to do it all over again!