Do you like to move around?
If yes, then you'll need to read more to find yourself a right bag.
There are 5 important questions that you'll have to answer below:
A) Will the bag will shared other than yourself?
If yes, you'll need to write down number of people sharing the bag. This is mainly true if you're travelling with family. The more the merrier, but you'll need a bigger bag!
B) How many set of clothes you'll need for the holiday?
This question is depending on how long you'll be going for holiday and how are you going to recycle the clothes (if you plan to wash and reuse it during the trip). Less set of clothes mean smaller bag!
C) What's the season of the place that you're going?
If winter, you'll need to prepare thicker clothing as compare to summer. Thicker clothes mean bigger bag!
D) What type of place that you'll be?
If you're going for hiking, you don't need to carry a hard case frame with wheels! Use your common sense and your trip planning is important. If you're on a long holiday, make sure you've the right combination of bags that give you an option to move from city to city and at the same time to carry small little stuff at your back.
E) What's your size?
Not everyone is a gladiator and no need to be one during your holiday. Just make sure you enjoy the trip! Too large a bag can cause slipping and result in your arm/hand going numb. Too small a bag will result in doing the blow/squeeze cycle more often than is optimal with detrimental impact on blowing tone.
That's all for now! Hope you'll get a suitable bag for your trip and enjoy the holiday.