Scalability, my friend. For the resources you put into producing 100 Eu/tic, I can produce 800 Eu/Tic. This continues to scale up as you continue to increase the size of your power supply to meet ever-increasing demands.
Oh! I feel stupid now. Of course we have different power demands. I'm more than satisfied with getting some UU out of the excess power from my 200 EU/t generation system and stopping there -- so for me it was just an exercise in "what's the most fun and new way of getting there". I'm afraid I don't see the point of accumulating UU just for the sake of having it, and beyond the amount needed to make three quantum suits (for all three regulars on my server), I didn't really feel like scaling EU generation up. I suppose it just ends up a difference in playing styles. Sorry for coming off a bit harsh.
[...]Lava is free, man. Go to nether. Pump out lava. Done. With Thermal Expansion, it gets easier with 'Go to nether, collect netherrack, throw in Crucible for lava', since it is easier to automatically transport solids than liquids across dimensional boundaries.
Iron, on the other hand, is far less common than 'near infinite' and has actual uses other than being an energy source
This is true, but getting lava out of the nether is something I've done before and didn't really want to redo... although now that you mention it, when/if I plug Mystcraft into the server I'll probably set up a short portal track to autogather via tank carts -- just to keep my home lava storage topped off and maintain the ability to generate power even when the humus (and ingredients for it) run out.
More immediately, and purely for this one game, I had the iron a lot closer than the lava, so I used it. It was... less irritating than I thought, especially since I cheated a bit and pretended I had the Railcraft 6.7 recipe for two turbine casings instead of one. But still, it was a lot of up-front investment.
Playing with steam is indeed fun, but not to generate Eu. At least not with a Turbine. You can run an entire Manufactorum on Steam.
Yes, I'm working up to a buildcraft/forestry room to use some of that excess I still have! Goodness, that max-size boiler makes a lot of steam.
I'm a big fan of the Biofuel powered steam boiler. Sure, it may not be quite as efficient as running it on charcoal, but hey... it's still at a cost of 'some hummus'. The top tier steam engine can run the refinery, and one of the middle tier ones on your fermenter.
Does biofuel do that much better than biomass? I don't really have the option yet, as I'm still running 1.3.2, but I was under the impression the biomass to biofuel conversion was fairly energy-inefficient.
Call me crazy, but I don't see 'spending eight times less to build something' as having a stick up my ass about efficiency. If it was less than twice... maybe. But that's a LOT of iron you're throwing down the toilet for very low return on investment.
There's that... but they don't really compare. Again, one-time costs neutralize themselves over time, so comparing them ends up a no-op after a few days. I can say I have yet to have to replace the turbine rotor in my oldest of two steam turbines, and I have the spare already cooked up and ready to go. That's... really good for maintenance, compared to the time I was putting into keeping all the farms and stuff going before I started automating with Logipipes.
Again, that scales differently in RC 6.7, where turbines die faster and don't return as much energy, but for this one game, it worked nicely. I don't think I'll be repeating it, but for anyone wanting a variation on EU generation, I'd recommend it at least once. Do you disagree?