charging all the time good or bad?

[dyskinesia]

ok. so sitting at work using TP but wondering if i'm shortening battery life but keeping it on charger while in use for entended periods vs. use it till it drains and then charge it? haven't decided on a 1500mah and switch then out vs getting the 2000mah and having the bigger footprint that then can't fit in any cases.

is keeping it on charger bad? also I noticed none of my usb chargers get abywhere close to the speed in which the stock HTC charger rechargesmy battery. just an observation.

thanks.