No Stickers>>>ever!!!!!
sorry, "sponser" stickers are USUALLY used for posing to look raceresque/sponsered unless you are actually getting paid to wear them. (I'm only assuming you're not otherwise you wouldn't be asking this question about their fashionibility)
also, I feel you are actually doing a disservice to sponsered riders by using them. If everybody rode around giving free advertising space to these companies then they'd have no reason to actually hook up people who get exposure for their products by competing and winning races and displaying their affiliation proudly.
This has been my philosophy since I raced mountain bikes and snowboards over a decade ago. I'd even take off or cover the product names that came on my gear when possible unless the company did something special for me. I don't wear designer label clothes ($20 for a simple tee shirt with a huge Nike logo?) and I hate logos, some people are walking billboards and don't know it.
that's my self rightous rant for the day, flame away...
nice bike naked though...