I'm hoping ya'll can share your ideas and/or pictures of simple birthday cakes for guys. Feminine cakes are so much easier for me! lol Thanks!

How about boobs? LOL. Tool box? Car? Find out what his interests are. I'd share my boob cake but I'm not allowed on here

If you search the galleries there are lots and lots of ideas.
I have many here's a few ideas:
http://cakecentral.com/gallery/1362506/best-wishes
http://cakecentral.com/gallery/1351608/generic-mans-birthday
http://cakecentral.com/gallery/1340957/generic-mens-design
http://cakecentral.com/gallery/1350853/generic-stripes-for-men
http://cakecentral.com/gallery/1350853/generic-stripes-for-men
http://cakecentral.com/gallery/1319367/generic-design-for-man
http://cakecentral.com/gallery/1319367/generic-design-for-man
http://cakecentral.com/gallery/1299018/western-scarf-boot
http://cakecentral.com/gallery/1291371/could-be-fathers-day-or-bday


Some will need a change of colors and such but hope the ideas will help.

haha No boobs or any "themes" or guy stuff just a birthday cake with a masculine feel.....

These are a couple of my favorites!

http://cakecentral.com/gallery/1786340/birthday-cake-for-a-wonderful-man
http://cakecentral.com/gallery/1675871/cake-with-bow

ew yeah I really like that second one, thanks! Anyone else.....???

While I am a big fan of cake that looks like a different food group (the pancake stack, french fry cake, cheeseburger cupcakes), here's a few different ideas too - and the galleries have mega-more in each category!
  
http://cakecentral.com/gallery/2075301/elementary-school-congratulations
this is a fondant cake with different color rings
  
http://cakecentral.com/gallery/2380360/rainbow-wishes
this is a tie-dye inside with M&M decorated outside. you can vary the color scheme on the outside. Buttercream, no fondant

http://cakecentral.com/gallery/2318749/the-sweetest-sandwich
A hero sandwich made from angelfood cake as a starting point with fondant and coconut lettuce.

Have fun!
Theresa

http://cakecentral.com/gallery/1974802/blue-argyle-baby-shower-cake
Take away the baby stuff and I like the argyle design.

I've always loved this cake - I think it's the most elegant, yet manly cake I have ever seen.

http://nyccakegirl.com/2012/05/18/our-latest-exciting-challenge/

The choice of colors and the structured, yet random geometric pattern is so unique. No frills, no flair, but probably not easy to pull off.

I like the argyle cake, I know my husband would love a cake like that!

I was picturing a square cake in a darker color, with maybe stripes (pinstripes?) for decor. I can't find a picture of anything like I have in my head though!

Here is one that has the stripes with it. I'm not too crazy about the circles. I love argyle designs on cakes.
http://www.flickr.com/photos/sweetsbyzoe/4287700373/in/faves-equine88/

This is a cute color combo with chocolate as a base color.
http://www.etsy.com/listing/86152277/outfit-for-first-birthday-party-photos