Here's my insight on the sets of 2009 -
Tank Droid - This is a big improvement over the other snail droid which was blue and was fragile to play with, but features were nice and the build was interesting. The 2009 Snail Droid (Tank Droid) is a huge improvement, looking more like the movie counterpart, being all gray, and having an improved build to look a little more menacing. Minifigures are a plus here, two jet troopers is awesome.
Overall I think this is an improvement and I will buy this If I have enough money after the AT-OT.
Hoth
Buying it no matter what. The minifigures are valuable and rare, and awesome collectors items, and the scenery and turret is pretty much the best for reincarnation of hoth battle scenes. Will look nice with my AT-AT
Pirate Tank
Looks great, figures are awesome, the only problem is it maybe out of my budget. I like the build and look though.
Separatists Shuttle
Small, like every droid ship or vehicle, minus the ATT. This is nice, the feature and build is sub-par while the figurines are a nice bonus. It's worth getting if you can afford, or as I should say, I can afford.
The Y-wing
Big time collectors might need this, and little kids who are fans might want it but will be cautious about putting out the money for it. Besides, the figures in this set are ridiculous. I rather not have two Anakins and Ahsoka minifigs. They should have put in a clone pilot and called it a day. Instead it is no minifigs im getting.
I'd say lower the price to 50 or add a clone or two.
Endor
A must buy for any star wars fan. The AT-ST is a huge improvement, over the blocky one release a year or two ago. I love the bunker, and the minifigures are awesome. This better not get sold out too quickly.
Mon Calamari
Alright, it's a good idea, but for 110 USD, I wouldn't consider.
Venator
This is really nice, maybe the coolest set besides the new Dropship w/ AT-OT. You have to love the features, (turret, bomb drop, handle, Palpatine's office) and the figures - Palpatine, 2 Senate Commandos, 1 Clone Pilot, 1 Clone Gunner. The ship looks really nice on display too, however price is conflicting with other sets. An expensive year.
Republic Dropship w/ At-Ot
This is one of those sets you can't believe Lego would think of doing. I can't explain why, I just know the feeling. The AT-OT first off was a very interesting vehicle seen in EP-III during the battle of Felucia and ever since lego builders just wanted to make one for their collection. The same goes for the Dropship, because the idea of carrying huge vehicles is pretty much epic, we all have to agree, the a LEGO set would be hard to come by. LEGO proved me wrong and combined two high demand products into one to really set our wallets on fire but bring us quality sets.
Best set on the market i think.