Because they work by capillary action, if you have the pen uncapped for too long, the trail of ink on the nib can dry enough that it gives you a hard start.

Recapping and uncapping can be distracting to others. There are some pens that have a click action like a regular pen but they are SPENDY.

Some of the paper quality issues can be mitigated by the ink choice and/or nib size.