A wise decision, as, unless you are duty-bound to intervene, escape is usually the best option in a confrontation. That being said, learning a martial art never hurts for those times that avoidance or escape is impossible.
Also, O'Malley, I generally agree with you that Aikido techniques, when done well, require virtually no force beyond simple body mechanics to work. That being said, I think gpseymour's point that good technique and the ability to bring force to bear are NOT mutually exclusive is well-taken. One of the reasons I'm strongly considering moving from Aikido to Jiu-Jitsu for my defensive needs (note that I still very much love the philosophy of Aikido and, even if I make the switch, will continue to train every so often just to remain a part of the community) is that Aikido is practiced under extremely controlled, pre-determined conditions which will often not be found in a real life confrontation. As much as I love Aikido, I feel that an art that mixes hard and soft technique, and allows for an escalation of force that the philosophy of Aikido shies away from, may serve better as a basis for self defense.