Ok, as someone who used Cubase as my first foray into recording, I can understand your confusion. However, things on linux work much more like real hardware, so to anyone besides you and me, who has used a tape machine or hdr, with a console, outboard effects, and a patchbay, the Ardour approach is much more sensible. Much like the way a beginner guitarist will want an all-in-one amplifier with effects, reverb, and several channels, whereas a seasoned pro used stompboxes, rackmounted processing and a dedicated power amplifier, this is the difference between a studio suite like Cubase and a dedicated editor/mixer/recorder like Ardour. Check out the plugins available at linuxdsp.co.uk or google search for the invada plugins if you need something with a fancy gui. Otherwise, the plugins included with ubuntustudio-audio-plugins in your standard repos are sure to have all the functionality you need (although they're not necessarily user-friendly, as a trade off though, the ladspa effects are generally quite system-resouce light, so you can use more than in a Cubase VST type setup). As for your issues with hydrogen, I don't really understand. When you use a piece of software like fruity loops or reason (i've never programmed drums in cubase), you must use a loop that's four beats long. To make a 3/4 beat in hydrogen, just change the pattern length to 12. The reason this is way more useful is in the case that you're making a song with one patter at 3/4, another at 4/4. and so on. Sure, it's a little bit harder to wrap your head around if you're only using one type of beat for a song, and you only use either 4/4 or 3/4 for any song you do, but for anyone looking to get truly creative (hence, anyone with moderate to advanced musical training), the complexity you can achieve with such a system is absolutely necessary.