My favorite riding pants are Pearl Izumi bibs and shorts. I prefer the bibs to the shorts. Due to the heavily padded crotch and the black color, not much shows. I've seen some wildly sexy red and white bibs from Assos and Castelli, but opt for the conservative black as my personal choice. Any serious biker will wear padded shorts, not plain lycra unpadded shorts. Nothing shows while you're riding; only when you stop and get off your bike. There are so many cyclists here in San Diego, that cycling gear is the norm, especially if you have a nice bike and ride a significant distance. Every time I go around Mission Bay or up Coast Highway, there are always numerous other cyclists on the road, and at least 95% are decked out in cycling clothes. The few times that I stop at a store or restaurant during a ride, I don't feel at all uncomfortable.
As far as comfort, you have to wear the shorts by themselves and let the padded crotch do its job - no briefs, no jocks as they will make your crotch sore from the seams. Lift your dick and balls up before you get on the seat and you're good to go. You can add tights, track pants, or leg warmers for the colder times of the year. On 25 or 50 mile event rides, I'll periodically need to lift my ball sac up if it gets trapped between my seat and skeletal structure. It's Sunday morning, and I can't wait to finish my coffee and go for a ride!