Out of respect for others I dont take off when there are expensive planes in the air. This has more to do with me being new and my lack of expierence flying with others then it does me feeling my plane isnt good enough to fly at the same time as thiers. Our club has very nice members though and the guys that fly giant scale will give the same respect right back and wait till my trainer is saftly parked back in the pits before they go back up. I am sure they are just as relieved to not have to worry about me crashing them as I am so its a win win

. I still feel very uncomfortable flying when others are in the air, my own plane is enough to look after at this point. If I flew at a more crowded field I would have to get over it sooner but my field isnt usualy very busy and there is only a couple people to take turns with most nights so its not a problem. I remember from sking/snowboarding it was always the expierenced persons responsiblity to watch out for the new guys. I assume rc planes is the same but I just dont want to go home feeling like crap for crashing someones 5k+ plane when all I had to do was wait 5-10 minute to get my turn.
If i already have my trainer in the air and someone does take off and start flying at the same time I will keep flying till I would of landed normaly. I figure they understood the risks of going up when a new guy was in the air and it is now thier responsibilty to stay out of my way