Do you still defrag?

Ofcourse, I still defrag regularly. I have drives woth total of 3.5 TB and much of it is heavily used, so defrag helps me a lot to keep the systems running smoothly and provides fast file access. I use a commercial automatic background real-time defragger and it works brilliantly..truly 'install and forget'. It even prevents much of the fragmentation. Google 'real-time defrag' for links to downloadable trial versions.

I still do defrag too. Sometimes I forget but mostly I defrag after I use my laptop.

I have always defragged my drives (use a fully automatic commercial defragger which works great) and believe it has helped prevent performance loss over time.

Yes i defrag my drives in every 15 days.

Yup,

I still doing defragmentation. I am doing it on weekly basis. I think its very important to increase the life of your pc.

I defrag my laptop drive once a month but sometimes less than that

Yes i still defrag,because i want to install some more softwares to my c Drive and i don't have much space there.

I have always defragged my pushes (use a completely automated professional defragger which performs great) and believe it has assisted avoid efficiency reduction over time.

Not really, it depends if it is needed.