re: Who was your favorite team for A&M to beat when you were in school?

Texas.

Texas Tech was more of a "WTF, how did we lose to this team?"

Baylor wasn't even an afterthought when I was in school. They were a non-thought.

To put it in perspective, the scores against those teams when I was in school:

Texas

15-51 (we were never in this one)
27-16 (MISERABLE RAINY DAY. It started raining 2 hours before kickoff and ended 2 hours afterwards)
24-26 (fricking prevent defense after overcoming a 23-7 2nd half deficit)
20-16 (The Bonfire Game)

Texas Tech

10-13 (86 yard screen pass to an ineligible player late in the 4th)
13-16 (Phantom Holding call ended a drive at the end)
17-10 (Shane Lechler threw a TD pass on a fake field goal)
19-21 (ANOTHER phantom holding call wiped out a 44 yard pass to the Tech 9. Scored on a blocked punt and 4 field goals)

Baylor

24-7 (longest run in A&M history by Tiki Hardeman stood until the 2009 season)
38-10 (never in doubt)
35-14 (never in doubt)
45-13 (finally ended the 10-quarter offensive touchdown drought in quarter 2)