Same. I tried some, and even in games they didn't provide much of an improvement. Sometimes performing worse, even.

I just put some niceties like irqbalance and add a few lines to sysctl.conf for better latency at a cost of throughput (doesn't matter if you're just using the system as a desktop and not as a server). And that gives me a very nice experience overall.

Edit: Please, be careful. This is under a very well performing machine, take a look at replies for more information.