Preflop question. What do people here raise from the BB?

[Allday Everyday]

5/10 Online. 10 Handed Texas Hold 'Em.

No reads on any player.

Preflop: Hero is BB with A [img]/images/graemlins/diamond.gif[/img], Q [img]/images/graemlins/club.gif[/img].
3 folds, MP1 calls, 1 fold, MP3 calls, 2 folds, SB calls, BB/Hero raises.

I take it I am correct to raise here? I am just wondering what people here generally preflop raise with from the BB against two and more limpers, given that you are unlikely to knock anyone out of the pot and will be OOP. I get a feeling I do it way too much. I even do it with ATo and 99. Is this wrong? Very wrong? What are the minimum requirements to raise here?

Please help me. Any response greatly appreciated.