[Girchuck]

Start adding hands you listed below,
AT: raise it once in a while see if you like it. AT is profitable.
A8s: same as above, also profitable.
KJ: Great for passive tables, raise it only if you play less than 3 tables, because you want some reads, and you don't have an autopilot routine for these raises.
(this applies to all the hands you specified, when you want to introduce them, drop down to 2 tables or less to estimate the effects better)
KTs: Add this after you are comfortable with KJ, it is still profitable.
JTs: Next level. This hand is a marginal raise UTG. Requires a lot of skill
KTo: This hand requires much more skill than what I currently possess.

Forget about open limping SH. Don't do this until you can profitably play KTo for a raise UTG (i.e. probably never)

Also, experiment with 55(66) and QJo.

This will give you a lot of hands to post on this forum. Do that whenever something interesing comes up. You will have a lot of interesting situations with these hands.