Right, I am an expert on this. I have:
Timbuk2: well made, ace for cycling. Looks “bikey”
Patagonia Critical Mass (2001 vintage). Ace, massive, no laptop sleeve. Looks “bikey”
Patagonia 1/2 mass – laptop sleeve, stupid fixed shoulder pad and crap strap.
Crumpler something – cheap (£20 TK Maxx), good for cycling, no laptop sleeve.
And finally, for work I recommend the Osprey Flapjack. Laptop sleeve, sensible pockets compared to Timbuk2, boring looking (ideal for work), top handle so you can carry it like a briefcase. OK on the bike.
I actually feel ashamed now 😳