Building a set vs buying a set

[Snowman]

For me, a big part of the joy of collecting cards is chasing and upgrading sets. Finding what you need, one by one can be a lot of fun, but it's often the more expensive route. I usually find myself buying lots and cherry picking the cards that align with my eye appeal preferences and filling in the gaps. Sometimes, I'll buy a full set, but it's never with the intention to keep it intact. I'll always find cards I want to upgrade. I'm curious about what the set building habits of others are. How often do you buy complete sets outright? How often do you find yourselves upgrading cards in your sets? Do you ever tire of certain sets and let them go in order to fund/chase another?