When they released holy power I gave up on my paladin. I played him through all of BC and Wotlk and loved him but as soon as holy power was introduced I had enough. I switched to warrior and have had a blast with him but I still miss my Paladin. I think it has a lot to do with having only a handful of abilities I actually need. Most of the stuff on my bar is never used or rarely used.
I really hope its better in MoP but I have a feeling that Paladin is just going to be more of the same.