Because they are very interesting and ages old.
From their "wildcat" routine that each class is allowed to do. WOOP only for Jr's and Sr's., to paying off Sully for a good test grade, to chugging a pitcher of beer no matter what your gender when you have "EARNED" your ring (It is a huge deal when a student has put in enough hours to earn the right to wear the ring) Search Youtube for "rink dunk", To the monthly mourning for A&M alumni who have passed, to the yearly Muster to pay respects to all Aggies who have passed during the year (Any Aggie within 100 miles on that date is supposed to get together during this time) To the tree that no one dares walk under alone, to the "Howdy" they speak to each other as they pass, to their disdain for the T Sippers from UT, to the Midnight Yell in which all single students light a lighter and whoevers flame of the opposite sex they touch has to be their date for the game the next day, to the kissing after scores, to their mascot Reveille who with one woof will excuse an entire classroom for the remaining class period, to a million other %!$@%@ things that would blow your mind.
I am a proud graduate of MSU but I am amazed at the PRIDE that the A&M students have to their school and their traditions. Their student rec center and their baseball and basketball stadiums are really a sight to behold. I still like Scott Field over Kyle Field.
I think they are going to make one heck of an addition to our SEC West!