I think it depends on the background of the particular CPFer. As a general trend, it seems those with a LE/Military background don't particularly have the hankerin for the uber small, uber bright lights. The requirements are a lot more practical.
Those that have more of a geeky background - computers/IT, engineering - seem to really latch onto the as small as possible lights.
Personally, I like an ARC AAA/Fenix L0P sized light on the keychain compared to the coin cell lights. And for pocket carry lights, I like the larger 1x123 lights and the smaller 2x123 lights. I've had G2s and Maxfires and to be honest, even though I don't jump on the latest/greatest/smallest lights, I feel the G2 is a bit too bulky to be ideal for me. The Vital Gear/Surefire E series lights are about the largest I want to routinely carry.
I think it also depends on attire. If you're wearing jeans and either a sweat shirt or a t-shirt and a button down shirt over the t-shirt, then larger lights may seem more comfortable. These days, this is how I dress about 80% of the time. When I dressed a bit more formally (ie, not jeans) those larger lights made me a bit more uncomfortable.
For example, when in the rural outdoors, wearing jeans, I'll often have my TL-3 in a back pocket. Wearing Dockers or nicer pants, I doubt I would ever do that. In fact, I've owned a TL-3 for probably about 2 years and I don't recall every carrying it in Dockers or dress slacks.