Oh boy I wish I could say the same. Admittedly I don't shut down on a daily basis but this didn't used to be a problem in SL. FWIW I've an old tank of a tower that has a video card on its last leg.. shutting down invariably leads to ~30 minutes of downtime while the card heats up and reconnects whatever needs reconnecting for both monitors to work.
Since Lion, I've noticed frequent hangs and beach-balls when doing even menial tasks. Transmit, terminal, texmate, a few tabs in chrome. If time machine starts backing up I can forget about a smooth Preview open or switching to a largish open textmate file without beach-ball'ing. If I want to use a Win7 Parallels VM--I can't do anything else. Even now as I type this I have a ubuntu vm running at the login screent and it causes the machine to shake off the cobwebs between almost everything.
It's certainly not a bad machine--there's 8gb ram, and tons of diskspace--good processor. In fact, I would go multiple months without a reboot and heavy use when on SL without hardly any problems at all.
Then there is the new i5 MBPro. Cool trick you can do: hook up an external monitor via thunderbolt and watch as the [left side] dock becomes a mangled mess with icons miss-positioned and wrongly triggering apps--it's like playing a game of whack-a-mole trying to open terminal to kill -KILL dock :)
The i5 has also been less than stellar compared to the older MBPro I sold to buy it in terms of performance.