I'm sorry you feel that way; I think many of us do at times. It really isn't about being ignored or feeling as if there is nothing to contribute or being a thread stopper. It is about timing and what it going on at any given time. Best is correct, I think - I'm fortunate enough to sleep at night so I'm not here real late and sometimes my work schedule keeps me tied up.
Keep coming back - you'll see. SR and the great folks here can really grow on you!