all the little tossers i don't care about. i have Sys Restore off, Hibernation file off and a small PageFile, so they aren't a concern either.
Same here.
I do a full defrag (or freespace defrag) very rarely, because it's time & HDD consuming. I usually just defrag the files whenever I feel like it, but if there's alot of fragments, maybe twice a month. Full defrag maybe once in 3+ months.
I might defrag more often if I'd still have HDD instead of SSD (as Windows drive). My HDDs are just for storage; don't need much defragmenting.
I do a full defrag just when I've cleaned the virus on my disc, then Defraggler do its job very well to bring the speed to normal again. Never been scheduled yet.
But i do the scanning on C: drive every week to see if the defrag is more than 20%. I think it optimizes the startup time a bit.