I myself have enabled the following and would be interested in what tweaks othrs are using together with any comments:-
Setting Setting Comment
RAM:Min-free OFF Let Android use up any free memory!
SD: Speed Tweak ON Larger file system cache
I/O: No-a-time ON Don't update access times
I/O Scheduler: OFF Tweaked IO (OFF to see if fixes bluetooth issue)
I/O Deadline Scheduler: ON Appears to make phone more responsive
Kernel Scheduler: ON Fairer Scheduler
CPU Conservative gov. OFF I use ondemand via SETCPU
VM: Swappiness ON Reduce tendency to swap
VM: Dirtyness ON Tune I/O Buffering
Media Stagefright: ON I get no problems with video playback.
Touchscreen sensitivity: OFF Screen fine as it is.
I am using deodexed JVO CF 3.2 (with ext4) with many frozen (and some deleted apps)
Phone is very responsive, no lags (Quadrant for those interested is 2200-2300)