From Anniesland as long as you head north or west you can't go too far wrong. I'd recommend heading out towards Milngavie with a map and seeing where you end up. But if you want specifics:
Don't worry about the A82 it only gets "interesting" once the dual carriageway ends after the Balloch roundabout. A good trip might be to head along as far as that roundabout, turn right and go through Balloch towards Drymen and then come back in on the Stockiemuir Road which will take you into Bearsden at St Andrew's college (as was). About 40 miles total.
The one Gav suggests is a good one too. Head for Milngavie, pass West of Scotland and Esporta out to Strathblane, turn right to Lennoxtown, on way out of Lennoxtown turn right for Torrance then turn right at the roundabout in Torrance, stop at Solid Rock Cycles in Balmore, then straight on through the roundabout and eventually you end up coming down the steep hill at the side of Asda, Bearsden. An easy 25 miles or so.
But don't be afraid of the Crow Road. Heading north it's not too bad - I'm not saying it's easy right enough. Do the same as above but turn left in the centre of Lennoxtown over the Campsies and down into Fintry, straight through Fintry and turn left at the next junction and you're on the road for Killearn, then just keep going past the Dumgoyne distillery and you'll be back in Milngavie in no time. Another 40 miler admittedly a little more demanding.
One of my favourite detours on the way to work would work for you as well. Head along the A82, over the bridge, and back into town via Inchinnan and Renfrew, Braehead and Govan. The section of road between the Red Smiddy and Inchinnan is the fastest bit of tarmac I can find. The wind always seems to be at your back and the surface is near perfect (at least it was last summer) I found I could maintain 25mph along there - on my hybrid!
Aberfoyle is maybe a bit far but if you can put the bike in the car and drive there the loop around Loch Katrine is well worth it. I can't remember how far it is but I think it's around 30 miles but it includes the Duke's Pass and (the much hillier than expected) private road on the east shore of the loch. Definitely well worth the effort. There's also other routes you can easily do from Aberfoyle using some of the roads we used on the forum ride if you wnat as little traffic as possible.
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However, with a tail wind it should be fun to power along. Nice and straight as well, so should have no major safety issues. 
