Nidana
Legend
The amount of time wasted while you hover over that healthbar and then have to rationally make decisions based on their health (which tells you relative gear level, etc) is absurd. Blizz UI is fine, if thats how you play best then by all means shit its not like theres that many abilites/items/macro's you can even have. But not showing health and percentage? You are simply giving yourself a major disadvantage through the wasting of your own time and therefore the delay of your own thought process and reaction times to situations.
All the Best,
Pattern
The first optical mouse was demonstrated in 1980. Steelseries makes decent mouse pads these days. My MS Intellimouse Explorer 3.0 and Steelseries QcK+ make a really nice couple!
The time I 'waste' to figure out how many HP left my target has never hurts my actions in any way just because I usually do it BEFORE starting combat or WHILE casting something and it's pretty easy to keep it in your head and calculate what you should do next