So my 4 year old seed grown citrus (types unknown!) were just getting to big and bushy for the house. Wife was complaining, i was getting stabbed by the spikes so i grabbed the pruner and went to town. I pretty much just pruned them to a central leader!!! Its not like i plan on getting fruit, pretty much they were an experiment in seed growing (citrus are SIMPLE to grow from seed). Not sure what to do with them in the long run. I guess I could practice grafting on to them or something.

Great plants you have, especially for indoors. You can remove the thorns by snipping them off as close to the stem or trunk as possible.

The one on the right looks like grapefruit due to the wide petiole wings. The middle one might be lemon--does it have bronze colored leaves when they are small?

Dr Manners has a site that can help you identify them.

Pruning back to the main leader should not hurt the node count, as the node count mostly progresses up the main stem. Starting when the trees were at 2 inches in height, had you begun to grow the trees in some wind, or with the use of an indoor fan to gently flick the trunk back and forth, the trees would have grown very full and with good branching at a much lower height on the trunk.

The top citrus was pruned maybe a couple weeks ago and it already has a lot of new growth. All three are very rootbound (i actually can pick the top one up and pull the whole works out of the 5 gallon container and set it out of the ground and put it back in. I know the 2 in the second pic leaves yellow WAY more then the first pic citrus (its leaves always stay a nice green). After i figure out what to do i'll replant (i'm going to use woodchips, because i have to move this things in and out during the course of the year and they are already really heavy).

Hard to tell in the top pick, but that huge jade i have has flowers on it...just a few, but its nice to see.