I've never owned an aluminin bass boat, but I have had two fiberglass boats.
If you fish big water, 'glass is best, my opinion. If you are fishing smaller lakes, and places where you don't have courtesy docks, no question, aluminum is the way to go.
I wish I had a very nice aluminum boat now. I live about 3 or 4 miles from two ramps on the green river, but I can't see me launching my big 'glass boat, then pulling it up on a shore littered with cantelope sized rocks. I believe I would fish a lot more here if I had an aluminum. If I were to ever move down around KY or Barkley lakes, like I hope to when I can retire, I will definately be glad I have my 'glass boat.
Lots of words to say that it depends upon YOUR use of the boat.
Danny